Home / 20,817.24-28,737.60-12,864.12

Finding the Fourth Proportional to 20,817.24, 28,737.60 and 12,864.12

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Solution

The fourth proportional to 20,817.24, 28,737.60 and 12,864.12 is: 17,758.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.24 : 28,737.60 = 12,864.12 : x
  2. Step 2: Convert to fraction form
    20,817.24/28,737.60 = 12,864.12/x
  3. Step 3: Cross multiply
    20,817.24x = 28,737.60 × 12,864.12
  4. Step 4: Simplify right side
    20,817.24x = 369,683,934.91
  5. Step 5: Solve for x
    x = 369,683,934.91/20,817.24
  6. Step 6: Final answer
    x = 17,758.55

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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.