Home / 13,142.66-18,137.28-7,478.23

Finding the Fourth Proportional to 13,142.66, 18,137.28 and 7,478.23

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Solution

The fourth proportional to 13,142.66, 18,137.28 and 7,478.23 is: 10,320.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,142.66 : 18,137.28 = 7,478.23 : x
  2. Step 2: Convert to fraction form
    13,142.66/18,137.28 = 7,478.23/x
  3. Step 3: Cross multiply
    13,142.66x = 18,137.28 × 7,478.23
  4. Step 4: Simplify right side
    13,142.66x = 135,634,706.07
  5. Step 5: Solve for x
    x = 135,634,706.07/13,142.66
  6. Step 6: Final answer
    x = 10,320.19

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Double scale
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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.