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Finding the Fourth Proportional to 28,029.17, 42,043.91 and 8,307.90

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Solution

The fourth proportional to 28,029.17, 42,043.91 and 8,307.90 is: 12,461.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,029.17 : 42,043.91 = 8,307.90 : x
  2. Step 2: Convert to fraction form
    28,029.17/42,043.91 = 8,307.90/x
  3. Step 3: Cross multiply
    28,029.17x = 42,043.91 × 8,307.90
  4. Step 4: Simplify right side
    28,029.17x = 349,296,599.89
  5. Step 5: Solve for x
    x = 349,296,599.89/28,029.17
  6. Step 6: Final answer
    x = 12,461.90

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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.