Home / 20,808.61-28,715.89-11,377.18

Finding the Fourth Proportional to 20,808.61, 28,715.89 and 11,377.18

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Solution

The fourth proportional to 20,808.61, 28,715.89 and 11,377.18 is: 15,700.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808.61 : 28,715.89 = 11,377.18 : x
  2. Step 2: Convert to fraction form
    20,808.61/28,715.89 = 11,377.18/x
  3. Step 3: Cross multiply
    20,808.61x = 28,715.89 × 11,377.18
  4. Step 4: Simplify right side
    20,808.61x = 326,705,849.39
  5. Step 5: Solve for x
    x = 326,705,849.39/20,808.61
  6. Step 6: Final answer
    x = 15,700.51

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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.