Home / 20,558.20-28,371.00-12,598.88

Finding the Fourth Proportional to 20,558.20, 28,371.00 and 12,598.88

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Solution

The fourth proportional to 20,558.20, 28,371.00 and 12,598.88 is: 17,386.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,558.20 : 28,371.00 = 12,598.88 : x
  2. Step 2: Convert to fraction form
    20,558.20/28,371.00 = 12,598.88/x
  3. Step 3: Cross multiply
    20,558.20x = 28,371.00 × 12,598.88
  4. Step 4: Simplify right side
    20,558.20x = 357,442,915.12
  5. Step 5: Solve for x
    x = 357,442,915.12/20,558.20
  6. Step 6: Final answer
    x = 17,386.88

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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.