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Finding the Fourth Proportional to 28,474.55, 42,715.91 and 8,754.76

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Solution

The fourth proportional to 28,474.55, 42,715.91 and 8,754.76 is: 13,133.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,474.55 : 42,715.91 = 8,754.76 : x
  2. Step 2: Convert to fraction form
    28,474.55/42,715.91 = 8,754.76/x
  3. Step 3: Cross multiply
    28,474.55x = 42,715.91 × 8,754.76
  4. Step 4: Simplify right side
    28,474.55x = 373,967,566.27
  5. Step 5: Solve for x
    x = 373,967,566.27/28,474.55
  6. Step 6: Final answer
    x = 13,133.40

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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.