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Finding the Fourth Proportional to 7,428.76, 10,243.02 and 6,171.28

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Solution

The fourth proportional to 7,428.76, 10,243.02 and 6,171.28 is: 8,509.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,428.76 : 10,243.02 = 6,171.28 : x
  2. Step 2: Convert to fraction form
    7,428.76/10,243.02 = 6,171.28/x
  3. Step 3: Cross multiply
    7,428.76x = 10,243.02 × 6,171.28
  4. Step 4: Simplify right side
    7,428.76x = 63,212,544.47
  5. Step 5: Solve for x
    x = 63,212,544.47/7,428.76
  6. Step 6: Final answer
    x = 8,509.16

Related Problems

Find fourth proportional to 3,714.38, 5,121.51 and 3,085.64
Half scale
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Double scale
Find fourth proportional to 7,429.76, 10,244.40 and 6,172.28
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.