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Finding the Fourth Proportional to 7,239.90, 9,990.99 and 4,053.23

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Solution

The fourth proportional to 7,239.90, 9,990.99 and 4,053.23 is: 5,593.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.90 : 9,990.99 = 4,053.23 : x
  2. Step 2: Convert to fraction form
    7,239.90/9,990.99 = 4,053.23/x
  3. Step 3: Cross multiply
    7,239.90x = 9,990.99 × 4,053.23
  4. Step 4: Simplify right side
    7,239.90x = 40,495,767.91
  5. Step 5: Solve for x
    x = 40,495,767.91/7,239.90
  6. Step 6: Final answer
    x = 5,593.41

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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.