Home / 28,128.42-38,817.18-15,553.08

Finding the Fourth Proportional to 28,128.42, 38,817.18 and 15,553.08

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Solution

The fourth proportional to 28,128.42, 38,817.18 and 15,553.08 is: 21,463.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128.42 : 38,817.18 = 15,553.08 : x
  2. Step 2: Convert to fraction form
    28,128.42/38,817.18 = 15,553.08/x
  3. Step 3: Cross multiply
    28,128.42x = 38,817.18 × 15,553.08
  4. Step 4: Simplify right side
    28,128.42x = 603,726,705.91
  5. Step 5: Solve for x
    x = 603,726,705.91/28,128.42
  6. Step 6: Final answer
    x = 21,463.23

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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.