Home / 17,877.12-26,739.12-12,890.88

Finding the Fourth Proportional to 17,877.12, 26,739.12 and 12,890.88

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Solution

The fourth proportional to 17,877.12, 26,739.12 and 12,890.88 is: 19,281.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,877.12 : 26,739.12 = 12,890.88 : x
  2. Step 2: Convert to fraction form
    17,877.12/26,739.12 = 12,890.88/x
  3. Step 3: Cross multiply
    17,877.12x = 26,739.12 × 12,890.88
  4. Step 4: Simplify right side
    17,877.12x = 344,690,787.23
  5. Step 5: Solve for x
    x = 344,690,787.23/17,877.12
  6. Step 6: Final answer
    x = 19,281.11

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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.