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Finding the Fourth Proportional to 7,116.44, 9,820.63 and 3,929.74

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Solution

The fourth proportional to 7,116.44, 9,820.63 and 3,929.74 is: 5,423.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,116.44 : 9,820.63 = 3,929.74 : x
  2. Step 2: Convert to fraction form
    7,116.44/9,820.63 = 3,929.74/x
  3. Step 3: Cross multiply
    7,116.44x = 9,820.63 × 3,929.74
  4. Step 4: Simplify right side
    7,116.44x = 38,592,522.54
  5. Step 5: Solve for x
    x = 38,592,522.54/7,116.44
  6. Step 6: Final answer
    x = 5,423.01

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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.