Home / 28,624.38-42,928.82-11,981

Finding the Fourth Proportional to 28,624.38, 42,928.82 and 11,981

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Solution

The fourth proportional to 28,624.38, 42,928.82 and 11,981 is: 17,968.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,624.38 : 42,928.82 = 11,981 : x
  2. Step 2: Convert to fraction form
    28,624.38/42,928.82 = 11,981/x
  3. Step 3: Cross multiply
    28,624.38x = 42,928.82 × 11,981
  4. Step 4: Simplify right side
    28,624.38x = 514,330,192.42
  5. Step 5: Solve for x
    x = 514,330,192.42/28,624.38
  6. Step 6: Final answer
    x = 17,968.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.