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Finding the Fourth Proportional to 18,747.60, 25,870.90 and 10,790.10

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Solution

The fourth proportional to 18,747.60, 25,870.90 and 10,790.10 is: 14,889.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,747.60 : 25,870.90 = 10,790.10 : x
  2. Step 2: Convert to fraction form
    18,747.60/25,870.90 = 10,790.10/x
  3. Step 3: Cross multiply
    18,747.60x = 25,870.90 × 10,790.10
  4. Step 4: Simplify right side
    18,747.60x = 279,149,598.09
  5. Step 5: Solve for x
    x = 279,149,598.09/18,747.60
  6. Step 6: Final answer
    x = 14,889.88

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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.