Home / 21,113.06-31,657.86-8,641.85

Finding the Fourth Proportional to 21,113.06, 31,657.86 and 8,641.85

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Solution

The fourth proportional to 21,113.06, 31,657.86 and 8,641.85 is: 12,957.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,113.06 : 31,657.86 = 8,641.85 : x
  2. Step 2: Convert to fraction form
    21,113.06/31,657.86 = 8,641.85/x
  3. Step 3: Cross multiply
    21,113.06x = 31,657.86 × 8,641.85
  4. Step 4: Simplify right side
    21,113.06x = 273,582,319.15
  5. Step 5: Solve for x
    x = 273,582,319.15/21,113.06
  6. Step 6: Final answer
    x = 12,957.97

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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.