Home / 13,065.47-18,019.17-8,815.80

Finding the Fourth Proportional to 13,065.47, 18,019.17 and 8,815.80

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Solution

The fourth proportional to 13,065.47, 18,019.17 and 8,815.80 is: 12,158.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,065.47 : 18,019.17 = 8,815.80 : x
  2. Step 2: Convert to fraction form
    13,065.47/18,019.17 = 8,815.80/x
  3. Step 3: Cross multiply
    13,065.47x = 18,019.17 × 8,815.80
  4. Step 4: Simplify right side
    13,065.47x = 158,853,398.89
  5. Step 5: Solve for x
    x = 158,853,398.89/13,065.47
  6. Step 6: Final answer
    x = 12,158.27

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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.