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Finding the Fourth Proportional to 10,347.30, 15,520.95 and 5,418.45

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Solution

The fourth proportional to 10,347.30, 15,520.95 and 5,418.45 is: 8,127.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,347.30 : 15,520.95 = 5,418.45 : x
  2. Step 2: Convert to fraction form
    10,347.30/15,520.95 = 5,418.45/x
  3. Step 3: Cross multiply
    10,347.30x = 15,520.95 × 5,418.45
  4. Step 4: Simplify right side
    10,347.30x = 84,099,491.53
  5. Step 5: Solve for x
    x = 84,099,491.53/10,347.30
  6. Step 6: Final answer
    x = 8,127.68

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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.