Home / 12,780.40-19,179.91-6,545.62

Finding the Fourth Proportional to 12,780.40, 19,179.91 and 6,545.62

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Solution

The fourth proportional to 12,780.40, 19,179.91 and 6,545.62 is: 9,823.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.40 : 19,179.91 = 6,545.62 : x
  2. Step 2: Convert to fraction form
    12,780.40/19,179.91 = 6,545.62/x
  3. Step 3: Cross multiply
    12,780.40x = 19,179.91 × 6,545.62
  4. Step 4: Simplify right side
    12,780.40x = 125,544,402.49
  5. Step 5: Solve for x
    x = 125,544,402.49/12,780.40
  6. Step 6: Final answer
    x = 9,823.20

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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.