Home / 20,780.66-28,677.11-11,349.23

Finding the Fourth Proportional to 20,780.66, 28,677.11 and 11,349.23

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Solution

The fourth proportional to 20,780.66, 28,677.11 and 11,349.23 is: 15,661.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.66 : 28,677.11 = 11,349.23 : x
  2. Step 2: Convert to fraction form
    20,780.66/28,677.11 = 11,349.23/x
  3. Step 3: Cross multiply
    20,780.66x = 28,677.11 × 11,349.23
  4. Step 4: Simplify right side
    20,780.66x = 325,462,916.99
  5. Step 5: Solve for x
    x = 325,462,916.99/20,780.66
  6. Step 6: Final answer
    x = 15,661.82

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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.