Home / 13,780.71-20,647.29-7,545.21

Finding the Fourth Proportional to 13,780.71, 20,647.29 and 7,545.21

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Solution

The fourth proportional to 13,780.71, 20,647.29 and 7,545.21 is: 11,304.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.71 : 20,647.29 = 7,545.21 : x
  2. Step 2: Convert to fraction form
    13,780.71/20,647.29 = 7,545.21/x
  3. Step 3: Cross multiply
    13,780.71x = 20,647.29 × 7,545.21
  4. Step 4: Simplify right side
    13,780.71x = 155,788,138.98
  5. Step 5: Solve for x
    x = 155,788,138.98/13,780.71
  6. Step 6: Final answer
    x = 11,304.80

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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.