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Finding the Fourth Proportional to 18,157.12, 25,048 and 12,854.88

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Solution

The fourth proportional to 18,157.12, 25,048 and 12,854.88 is: 17,733.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,157.12 : 25,048 = 12,854.88 : x
  2. Step 2: Convert to fraction form
    18,157.12/25,048 = 12,854.88/x
  3. Step 3: Cross multiply
    18,157.12x = 25,048 × 12,854.88
  4. Step 4: Simplify right side
    18,157.12x = 321,989,034.24
  5. Step 5: Solve for x
    x = 321,989,034.24/18,157.12
  6. Step 6: Final answer
    x = 17,733.49

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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.