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Finding the Fourth Proportional to 12,679.62, 17,488.08 and 9,688.02

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Solution

The fourth proportional to 12,679.62, 17,488.08 and 9,688.02 is: 13,361.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,679.62 : 17,488.08 = 9,688.02 : x
  2. Step 2: Convert to fraction form
    12,679.62/17,488.08 = 9,688.02/x
  3. Step 3: Cross multiply
    12,679.62x = 17,488.08 × 9,688.02
  4. Step 4: Simplify right side
    12,679.62x = 169,424,868.80
  5. Step 5: Solve for x
    x = 169,424,868.80/12,679.62
  6. Step 6: Final answer
    x = 13,361.98

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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.