Home / 15,495.30-21,385.89-8,781.62

Finding the Fourth Proportional to 15,495.30, 21,385.89 and 8,781.62

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Solution

The fourth proportional to 15,495.30, 21,385.89 and 8,781.62 is: 12,119.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.30 : 21,385.89 = 8,781.62 : x
  2. Step 2: Convert to fraction form
    15,495.30/21,385.89 = 8,781.62/x
  3. Step 3: Cross multiply
    15,495.30x = 21,385.89 × 8,781.62
  4. Step 4: Simplify right side
    15,495.30x = 187,802,652.41
  5. Step 5: Solve for x
    x = 187,802,652.41/15,495.30
  6. Step 6: Final answer
    x = 12,119.98

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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.