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Finding the Fourth Proportional to 13,396.87, 18,488.05 and 7,347.39

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Solution

The fourth proportional to 13,396.87, 18,488.05 and 7,347.39 is: 10,139.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,396.87 : 18,488.05 = 7,347.39 : x
  2. Step 2: Convert to fraction form
    13,396.87/18,488.05 = 7,347.39/x
  3. Step 3: Cross multiply
    13,396.87x = 18,488.05 × 7,347.39
  4. Step 4: Simplify right side
    13,396.87x = 135,838,947.80
  5. Step 5: Solve for x
    x = 135,838,947.80/13,396.87
  6. Step 6: Final answer
    x = 10,139.60

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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.