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Finding the Fourth Proportional to 7,430.10, 11,127.15 and 3,959.70

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Solution

The fourth proportional to 7,430.10, 11,127.15 and 3,959.70 is: 5,929.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,430.10 : 11,127.15 = 3,959.70 : x
  2. Step 2: Convert to fraction form
    7,430.10/11,127.15 = 3,959.70/x
  3. Step 3: Cross multiply
    7,430.10x = 11,127.15 × 3,959.70
  4. Step 4: Simplify right side
    7,430.10x = 44,060,175.86
  5. Step 5: Solve for x
    x = 44,060,175.86/7,430.10
  6. Step 6: Final answer
    x = 5,929.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.