Home / 18,688.90-28,047.24-8,831.20

Finding the Fourth Proportional to 18,688.90, 28,047.24 and 8,831.20

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Solution

The fourth proportional to 18,688.90, 28,047.24 and 8,831.20 is: 13,253.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,688.90 : 28,047.24 = 8,831.20 : x
  2. Step 2: Convert to fraction form
    18,688.90/28,047.24 = 8,831.20/x
  3. Step 3: Cross multiply
    18,688.90x = 28,047.24 × 8,831.20
  4. Step 4: Simplify right side
    18,688.90x = 247,690,785.89
  5. Step 5: Solve for x
    x = 247,690,785.89/18,688.90
  6. Step 6: Final answer
    x = 13,253.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.