Home / 13,139.16-18,132.04-8,423.44

Finding the Fourth Proportional to 13,139.16, 18,132.04 and 8,423.44

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Solution

The fourth proportional to 13,139.16, 18,132.04 and 8,423.44 is: 11,624.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.16 : 18,132.04 = 8,423.44 : x
  2. Step 2: Convert to fraction form
    13,139.16/18,132.04 = 8,423.44/x
  3. Step 3: Cross multiply
    13,139.16x = 18,132.04 × 8,423.44
  4. Step 4: Simplify right side
    13,139.16x = 152,734,084.63
  5. Step 5: Solve for x
    x = 152,734,084.63/13,139.16
  6. Step 6: Final answer
    x = 11,624.34

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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.