Home / 28,126.49-38,760.89-20,154.87

Finding the Fourth Proportional to 28,126.49, 38,760.89 and 20,154.87

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Solution

The fourth proportional to 28,126.49, 38,760.89 and 20,154.87 is: 27,775.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,126.49 : 38,760.89 = 20,154.87 : x
  2. Step 2: Convert to fraction form
    28,126.49/38,760.89 = 20,154.87/x
  3. Step 3: Cross multiply
    28,126.49x = 38,760.89 × 20,154.87
  4. Step 4: Simplify right side
    28,126.49x = 781,220,598.26
  5. Step 5: Solve for x
    x = 781,220,598.26/28,126.49
  6. Step 6: Final answer
    x = 27,775.27

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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.