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Finding the Fourth Proportional to 28,555.34, 42,835.01 and 8,831.30

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Solution

The fourth proportional to 28,555.34, 42,835.01 and 8,831.30 is: 13,247.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,555.34 : 42,835.01 = 8,831.30 : x
  2. Step 2: Convert to fraction form
    28,555.34/42,835.01 = 8,831.30/x
  3. Step 3: Cross multiply
    28,555.34x = 42,835.01 × 8,831.30
  4. Step 4: Simplify right side
    28,555.34x = 378,288,565.48
  5. Step 5: Solve for x
    x = 378,288,565.48/28,555.34
  6. Step 6: Final answer
    x = 13,247.56

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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.