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Finding the Fourth Proportional to 14,699.92, 20,285.88 and 8,412.28

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Solution

The fourth proportional to 14,699.92, 20,285.88 and 8,412.28 is: 11,608.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,699.92 : 20,285.88 = 8,412.28 : x
  2. Step 2: Convert to fraction form
    14,699.92/20,285.88 = 8,412.28/x
  3. Step 3: Cross multiply
    14,699.92x = 20,285.88 × 8,412.28
  4. Step 4: Simplify right side
    14,699.92x = 170,650,502.61
  5. Step 5: Solve for x
    x = 170,650,502.61/14,699.92
  6. Step 6: Final answer
    x = 11,608.94

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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.