Home / 15,385.28-21,230.88-8,670.92

Finding the Fourth Proportional to 15,385.28, 21,230.88 and 8,670.92

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Solution

The fourth proportional to 15,385.28, 21,230.88 and 8,670.92 is: 11,965.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.28 : 21,230.88 = 8,670.92 : x
  2. Step 2: Convert to fraction form
    15,385.28/21,230.88 = 8,670.92/x
  3. Step 3: Cross multiply
    15,385.28x = 21,230.88 × 8,670.92
  4. Step 4: Simplify right side
    15,385.28x = 184,091,262.01
  5. Step 5: Solve for x
    x = 184,091,262.01/15,385.28
  6. Step 6: Final answer
    x = 11,965.42

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Double scale
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Similar ratio
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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.