Home / 20,281.48-30,431.28-12,883.92

Finding the Fourth Proportional to 20,281.48, 30,431.28 and 12,883.92

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Solution

The fourth proportional to 20,281.48, 30,431.28 and 12,883.92 is: 19,331.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.48 : 30,431.28 = 12,883.92 : x
  2. Step 2: Convert to fraction form
    20,281.48/30,431.28 = 12,883.92/x
  3. Step 3: Cross multiply
    20,281.48x = 30,431.28 × 12,883.92
  4. Step 4: Simplify right side
    20,281.48x = 392,074,177.02
  5. Step 5: Solve for x
    x = 392,074,177.02/20,281.48
  6. Step 6: Final answer
    x = 19,331.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.