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Finding the Fourth Proportional to 13,376.95, 20,065.42 and 5,979.42

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Solution

The fourth proportional to 13,376.95, 20,065.42 and 5,979.42 is: 8,969.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,376.95 : 20,065.42 = 5,979.42 : x
  2. Step 2: Convert to fraction form
    13,376.95/20,065.42 = 5,979.42/x
  3. Step 3: Cross multiply
    13,376.95x = 20,065.42 × 5,979.42
  4. Step 4: Simplify right side
    13,376.95x = 119,979,581.13
  5. Step 5: Solve for x
    x = 119,979,581.13/13,376.95
  6. Step 6: Final answer
    x = 8,969.13

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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.