Home / 15,685.80-21,646.76-8,972.04

Finding the Fourth Proportional to 15,685.80, 21,646.76 and 8,972.04

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Solution

The fourth proportional to 15,685.80, 21,646.76 and 8,972.04 is: 12,381.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,685.80 : 21,646.76 = 8,972.04 : x
  2. Step 2: Convert to fraction form
    15,685.80/21,646.76 = 8,972.04/x
  3. Step 3: Cross multiply
    15,685.80x = 21,646.76 × 8,972.04
  4. Step 4: Simplify right side
    15,685.80x = 194,215,596.59
  5. Step 5: Solve for x
    x = 194,215,596.59/15,685.80
  6. Step 6: Final answer
    x = 12,381.62

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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.