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Finding the Fourth Proportional to 8,985.13, 12,400.29 and 5,007.22

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Solution

The fourth proportional to 8,985.13, 12,400.29 and 5,007.22 is: 6,910.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.13 : 12,400.29 = 5,007.22 : x
  2. Step 2: Convert to fraction form
    8,985.13/12,400.29 = 5,007.22/x
  3. Step 3: Cross multiply
    8,985.13x = 12,400.29 × 5,007.22
  4. Step 4: Simplify right side
    8,985.13x = 62,090,949.09
  5. Step 5: Solve for x
    x = 62,090,949.09/8,985.13
  6. Step 6: Final answer
    x = 6,910.41

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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.