Home / 20,618.98-28,454.16-11,187.52

Finding the Fourth Proportional to 20,618.98, 28,454.16 and 11,187.52

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Solution

The fourth proportional to 20,618.98, 28,454.16 and 11,187.52 is: 15,438.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.98 : 28,454.16 = 11,187.52 : x
  2. Step 2: Convert to fraction form
    20,618.98/28,454.16 = 11,187.52/x
  3. Step 3: Cross multiply
    20,618.98x = 28,454.16 × 11,187.52
  4. Step 4: Simplify right side
    20,618.98x = 318,331,484.08
  5. Step 5: Solve for x
    x = 318,331,484.08/20,618.98
  6. Step 6: Final answer
    x = 15,438.76

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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.