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Finding the Fourth Proportional to 15,496.04, 21,385 and 8,781.68

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Solution

The fourth proportional to 15,496.04, 21,385 and 8,781.68 is: 12,118.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,496.04 : 21,385 = 8,781.68 : x
  2. Step 2: Convert to fraction form
    15,496.04/21,385 = 8,781.68/x
  3. Step 3: Cross multiply
    15,496.04x = 21,385 × 8,781.68
  4. Step 4: Simplify right side
    15,496.04x = 187,796,226.80
  5. Step 5: Solve for x
    x = 187,796,226.80/15,496.04
  6. Step 6: Final answer
    x = 12,118.98

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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.