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Finding the Fourth Proportional to 12,910.81, 17,822.82 and 9,925.60

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Solution

The fourth proportional to 12,910.81, 17,822.82 and 9,925.60 is: 13,701.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,910.81 : 17,822.82 = 9,925.60 : x
  2. Step 2: Convert to fraction form
    12,910.81/17,822.82 = 9,925.60/x
  3. Step 3: Cross multiply
    12,910.81x = 17,822.82 × 9,925.60
  4. Step 4: Simplify right side
    12,910.81x = 176,902,182.19
  5. Step 5: Solve for x
    x = 176,902,182.19/12,910.81
  6. Step 6: Final answer
    x = 13,701.87

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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.