Home / 28,031.28-38,681.19-15,455.76

Finding the Fourth Proportional to 28,031.28, 38,681.19 and 15,455.76

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Solution

The fourth proportional to 28,031.28, 38,681.19 and 15,455.76 is: 21,327.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,031.28 : 38,681.19 = 15,455.76 : x
  2. Step 2: Convert to fraction form
    28,031.28/38,681.19 = 15,455.76/x
  3. Step 3: Cross multiply
    28,031.28x = 38,681.19 × 15,455.76
  4. Step 4: Simplify right side
    28,031.28x = 597,847,189.15
  5. Step 5: Solve for x
    x = 597,847,189.15/28,031.28
  6. Step 6: Final answer
    x = 21,327.86

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Half scale
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Double scale
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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.