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Finding the Fourth Proportional to 18,271.98, 25,217.80 and 10,720.15

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Solution

The fourth proportional to 18,271.98, 25,217.80 and 10,720.15 is: 14,795.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,271.98 : 25,217.80 = 10,720.15 : x
  2. Step 2: Convert to fraction form
    18,271.98/25,217.80 = 10,720.15/x
  3. Step 3: Cross multiply
    18,271.98x = 25,217.80 × 10,720.15
  4. Step 4: Simplify right side
    18,271.98x = 270,338,508.83
  5. Step 5: Solve for x
    x = 270,338,508.83/18,271.98
  6. Step 6: Final answer
    x = 14,795.25

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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.