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Finding the Fourth Proportional to 28,476.29, 42,712.74 and 8,754.71

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Solution

The fourth proportional to 28,476.29, 42,712.74 and 8,754.71 is: 13,131.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,476.29 : 42,712.74 = 8,754.71 : x
  2. Step 2: Convert to fraction form
    28,476.29/42,712.74 = 8,754.71/x
  3. Step 3: Cross multiply
    28,476.29x = 42,712.74 × 8,754.71
  4. Step 4: Simplify right side
    28,476.29x = 373,937,438.44
  5. Step 5: Solve for x
    x = 373,937,438.44/28,476.29
  6. Step 6: Final answer
    x = 13,131.54

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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.