Home / 13,377.38-18,456.63-7,711.40

Finding the Fourth Proportional to 13,377.38, 18,456.63 and 7,711.40

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Solution

The fourth proportional to 13,377.38, 18,456.63 and 7,711.40 is: 10,639.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,377.38 : 18,456.63 = 7,711.40 : x
  2. Step 2: Convert to fraction form
    13,377.38/18,456.63 = 7,711.40/x
  3. Step 3: Cross multiply
    13,377.38x = 18,456.63 × 7,711.40
  4. Step 4: Simplify right side
    13,377.38x = 142,326,373.28
  5. Step 5: Solve for x
    x = 142,326,373.28/13,377.38
  6. Step 6: Final answer
    x = 10,639.33

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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.