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Finding the Fourth Proportional to 18,779.52, 25,937.02 and 12,800.92

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Solution

The fourth proportional to 18,779.52, 25,937.02 and 12,800.92 is: 17,679.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,779.52 : 25,937.02 = 12,800.92 : x
  2. Step 2: Convert to fraction form
    18,779.52/25,937.02 = 12,800.92/x
  3. Step 3: Cross multiply
    18,779.52x = 25,937.02 × 12,800.92
  4. Step 4: Simplify right side
    18,779.52x = 332,017,718.06
  5. Step 5: Solve for x
    x = 332,017,718.06/18,779.52
  6. Step 6: Final answer
    x = 17,679.78

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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.