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Finding the Fourth Proportional to 10,612.72, 14,631.76 and 6,829.12

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Solution

The fourth proportional to 10,612.72, 14,631.76 and 6,829.12 is: 9,415.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,612.72 : 14,631.76 = 6,829.12 : x
  2. Step 2: Convert to fraction form
    10,612.72/14,631.76 = 6,829.12/x
  3. Step 3: Cross multiply
    10,612.72x = 14,631.76 × 6,829.12
  4. Step 4: Simplify right side
    10,612.72x = 99,922,044.85
  5. Step 5: Solve for x
    x = 99,922,044.85/10,612.72
  6. Step 6: Final answer
    x = 9,415.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.