Home / 28,057.35-38,718.90-15,310.79

Finding the Fourth Proportional to 28,057.35, 38,718.90 and 15,310.79

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Solution

The fourth proportional to 28,057.35, 38,718.90 and 15,310.79 is: 21,128.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,057.35 : 38,718.90 = 15,310.79 : x
  2. Step 2: Convert to fraction form
    28,057.35/38,718.90 = 15,310.79/x
  3. Step 3: Cross multiply
    28,057.35x = 38,718.90 × 15,310.79
  4. Step 4: Simplify right side
    28,057.35x = 592,816,753.34
  5. Step 5: Solve for x
    x = 592,816,753.34/28,057.35
  6. Step 6: Final answer
    x = 21,128.75

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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.