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Finding the Fourth Proportional to 28,437.44, 42,664.36 and 8,718.91

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Solution

The fourth proportional to 28,437.44, 42,664.36 and 8,718.91 is: 13,080.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,437.44 : 42,664.36 = 8,718.91 : x
  2. Step 2: Convert to fraction form
    28,437.44/42,664.36 = 8,718.91/x
  3. Step 3: Cross multiply
    28,437.44x = 42,664.36 × 8,718.91
  4. Step 4: Simplify right side
    28,437.44x = 371,986,479.93
  5. Step 5: Solve for x
    x = 371,986,479.93/28,437.44
  6. Step 6: Final answer
    x = 13,080.87

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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.