Home / 20,860.17-28,814.63-15,545.76

Finding the Fourth Proportional to 20,860.17, 28,814.63 and 15,545.76

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Solution

The fourth proportional to 20,860.17, 28,814.63 and 15,545.76 is: 21,473.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.17 : 28,814.63 = 15,545.76 : x
  2. Step 2: Convert to fraction form
    20,860.17/28,814.63 = 15,545.76/x
  3. Step 3: Cross multiply
    20,860.17x = 28,814.63 × 15,545.76
  4. Step 4: Simplify right side
    20,860.17x = 447,945,322.47
  5. Step 5: Solve for x
    x = 447,945,322.47/20,860.17
  6. Step 6: Final answer
    x = 21,473.71

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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.