Home / 13,279.71-18,325.95-7,311.39

Finding the Fourth Proportional to 13,279.71, 18,325.95 and 7,311.39

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Solution

The fourth proportional to 13,279.71, 18,325.95 and 7,311.39 is: 10,089.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.71 : 18,325.95 = 7,311.39 : x
  2. Step 2: Convert to fraction form
    13,279.71/18,325.95 = 7,311.39/x
  3. Step 3: Cross multiply
    13,279.71x = 18,325.95 × 7,311.39
  4. Step 4: Simplify right side
    13,279.71x = 133,988,167.57
  5. Step 5: Solve for x
    x = 133,988,167.57/13,279.71
  6. Step 6: Final answer
    x = 10,089.69

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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.