Home / 15,854.98-21,877.89-8,781.46

Finding the Fourth Proportional to 15,854.98, 21,877.89 and 8,781.46

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Solution

The fourth proportional to 15,854.98, 21,877.89 and 8,781.46 is: 12,117.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,854.98 : 21,877.89 = 8,781.46 : x
  2. Step 2: Convert to fraction form
    15,854.98/21,877.89 = 8,781.46/x
  3. Step 3: Cross multiply
    15,854.98x = 21,877.89 × 8,781.46
  4. Step 4: Simplify right side
    15,854.98x = 192,119,815.92
  5. Step 5: Solve for x
    x = 192,119,815.92/15,854.98
  6. Step 6: Final answer
    x = 12,117.32

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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.