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Finding the Fourth Proportional to 28,080.47, 42,125.87 and 8,356.77

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Solution

The fourth proportional to 28,080.47, 42,125.87 and 8,356.77 is: 12,536.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,080.47 : 42,125.87 = 8,356.77 : x
  2. Step 2: Convert to fraction form
    28,080.47/42,125.87 = 8,356.77/x
  3. Step 3: Cross multiply
    28,080.47x = 42,125.87 × 8,356.77
  4. Step 4: Simplify right side
    28,080.47x = 352,036,227.53
  5. Step 5: Solve for x
    x = 352,036,227.53/28,080.47
  6. Step 6: Final answer
    x = 12,536.69

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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.