Home / 28,447.86-42,657.75-8,721.66

Finding the Fourth Proportional to 28,447.86, 42,657.75 and 8,721.66

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Solution

The fourth proportional to 28,447.86, 42,657.75 and 8,721.66 is: 13,078.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,447.86 : 42,657.75 = 8,721.66 : x
  2. Step 2: Convert to fraction form
    28,447.86/42,657.75 = 8,721.66/x
  3. Step 3: Cross multiply
    28,447.86x = 42,657.75 × 8,721.66
  4. Step 4: Simplify right side
    28,447.86x = 372,046,391.87
  5. Step 5: Solve for x
    x = 372,046,391.87/28,447.86
  6. Step 6: Final answer
    x = 13,078.19

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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.