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Finding the Fourth Proportional to 8,999.97, 12,419.92 and 5,021.08

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Solution

The fourth proportional to 8,999.97, 12,419.92 and 5,021.08 is: 6,929.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.97 : 12,419.92 = 5,021.08 : x
  2. Step 2: Convert to fraction form
    8,999.97/12,419.92 = 5,021.08/x
  3. Step 3: Cross multiply
    8,999.97x = 12,419.92 × 5,021.08
  4. Step 4: Simplify right side
    8,999.97x = 62,361,411.91
  5. Step 5: Solve for x
    x = 62,361,411.91/8,999.97
  6. Step 6: Final answer
    x = 6,929.07

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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.