Home / 15,229.90-21,006.85-9,931.89

Finding the Fourth Proportional to 15,229.90, 21,006.85 and 9,931.89

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Solution

The fourth proportional to 15,229.90, 21,006.85 and 9,931.89 is: 13,699.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,229.90 : 21,006.85 = 9,931.89 : x
  2. Step 2: Convert to fraction form
    15,229.90/21,006.85 = 9,931.89/x
  3. Step 3: Cross multiply
    15,229.90x = 21,006.85 × 9,931.89
  4. Step 4: Simplify right side
    15,229.90x = 208,637,723.45
  5. Step 5: Solve for x
    x = 208,637,723.45/15,229.90
  6. Step 6: Final answer
    x = 13,699.22

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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.