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Finding the Fourth Proportional to 18,831.98, 25,990.35 and 10,449.02

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Solution

The fourth proportional to 18,831.98, 25,990.35 and 10,449.02 is: 14,420.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831.98 : 25,990.35 = 10,449.02 : x
  2. Step 2: Convert to fraction form
    18,831.98/25,990.35 = 10,449.02/x
  3. Step 3: Cross multiply
    18,831.98x = 25,990.35 × 10,449.02
  4. Step 4: Simplify right side
    18,831.98x = 271,573,686.96
  5. Step 5: Solve for x
    x = 271,573,686.96/18,831.98
  6. Step 6: Final answer
    x = 14,420.88

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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.