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Finding the Fourth Proportional to 13,488.79, 18,612.99 and 7,822.36

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Solution

The fourth proportional to 13,488.79, 18,612.99 and 7,822.36 is: 10,793.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,488.79 : 18,612.99 = 7,822.36 : x
  2. Step 2: Convert to fraction form
    13,488.79/18,612.99 = 7,822.36/x
  3. Step 3: Cross multiply
    13,488.79x = 18,612.99 × 7,822.36
  4. Step 4: Simplify right side
    13,488.79x = 145,597,508.46
  5. Step 5: Solve for x
    x = 145,597,508.46/13,488.79
  6. Step 6: Final answer
    x = 10,793.96

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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.