Home / 12,780.59-19,139.90-9,065.12

Finding the Fourth Proportional to 12,780.59, 19,139.90 and 9,065.12

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Solution

The fourth proportional to 12,780.59, 19,139.90 and 9,065.12 is: 13,575.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.59 : 19,139.90 = 9,065.12 : x
  2. Step 2: Convert to fraction form
    12,780.59/19,139.90 = 9,065.12/x
  3. Step 3: Cross multiply
    12,780.59x = 19,139.90 × 9,065.12
  4. Step 4: Simplify right side
    12,780.59x = 173,505,349.26
  5. Step 5: Solve for x
    x = 173,505,349.26/12,780.59
  6. Step 6: Final answer
    x = 13,575.70

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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.