Home / 28,084.32-42,120-10,555.92

Finding the Fourth Proportional to 28,084.32, 42,120 and 10,555.92

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Solution

The fourth proportional to 28,084.32, 42,120 and 10,555.92 is: 15,831.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,084.32 : 42,120 = 10,555.92 : x
  2. Step 2: Convert to fraction form
    28,084.32/42,120 = 10,555.92/x
  3. Step 3: Cross multiply
    28,084.32x = 42,120 × 10,555.92
  4. Step 4: Simplify right side
    28,084.32x = 444,615,350.40
  5. Step 5: Solve for x
    x = 444,615,350.40/28,084.32
  6. Step 6: Final answer
    x = 15,831.44

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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.