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Finding the Fourth Proportional to 28,472.42, 42,707.56 and 8,750.46

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Solution

The fourth proportional to 28,472.42, 42,707.56 and 8,750.46 is: 13,125.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,472.42 : 42,707.56 = 8,750.46 : x
  2. Step 2: Convert to fraction form
    28,472.42/42,707.56 = 8,750.46/x
  3. Step 3: Cross multiply
    28,472.42x = 42,707.56 × 8,750.46
  4. Step 4: Simplify right side
    28,472.42x = 373,710,950.16
  5. Step 5: Solve for x
    x = 373,710,950.16/28,472.42
  6. Step 6: Final answer
    x = 13,125.37

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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.