Home / 18,639.90-25,723.50-10,142.48

Finding the Fourth Proportional to 18,639.90, 25,723.50 and 10,142.48

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Solution

The fourth proportional to 18,639.90, 25,723.50 and 10,142.48 is: 13,996.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.90 : 25,723.50 = 10,142.48 : x
  2. Step 2: Convert to fraction form
    18,639.90/25,723.50 = 10,142.48/x
  3. Step 3: Cross multiply
    18,639.90x = 25,723.50 × 10,142.48
  4. Step 4: Simplify right side
    18,639.90x = 260,900,084.28
  5. Step 5: Solve for x
    x = 260,900,084.28/18,639.90
  6. Step 6: Final answer
    x = 13,996.86

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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.