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Finding the Fourth Proportional to 7,239.09, 9,985.50 and 6,397.09

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Solution

The fourth proportional to 7,239.09, 9,985.50 and 6,397.09 is: 8,824.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.09 : 9,985.50 = 6,397.09 : x
  2. Step 2: Convert to fraction form
    7,239.09/9,985.50 = 6,397.09/x
  3. Step 3: Cross multiply
    7,239.09x = 9,985.50 × 6,397.09
  4. Step 4: Simplify right side
    7,239.09x = 63,878,142.20
  5. Step 5: Solve for x
    x = 63,878,142.20/7,239.09
  6. Step 6: Final answer
    x = 8,824.06

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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.