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Finding the Fourth Proportional to 10,969.78, 16,432.80 and 9,329.80

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Solution

The fourth proportional to 10,969.78, 16,432.80 and 9,329.80 is: 13,976.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,969.78 : 16,432.80 = 9,329.80 : x
  2. Step 2: Convert to fraction form
    10,969.78/16,432.80 = 9,329.80/x
  3. Step 3: Cross multiply
    10,969.78x = 16,432.80 × 9,329.80
  4. Step 4: Simplify right side
    10,969.78x = 153,314,737.44
  5. Step 5: Solve for x
    x = 153,314,737.44/10,969.78
  6. Step 6: Final answer
    x = 13,976.10

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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.