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Finding the Fourth Proportional to 10,240.40, 15,356.76 and 4,394

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Solution

The fourth proportional to 10,240.40, 15,356.76 and 4,394 is: 6,589.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,240.40 : 15,356.76 = 4,394 : x
  2. Step 2: Convert to fraction form
    10,240.40/15,356.76 = 4,394/x
  3. Step 3: Cross multiply
    10,240.40x = 15,356.76 × 4,394
  4. Step 4: Simplify right side
    10,240.40x = 67,477,603.44
  5. Step 5: Solve for x
    x = 67,477,603.44/10,240.40
  6. Step 6: Final answer
    x = 6,589.35

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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.