Home / 12,988.14-17,919.44-7,947.11

Finding the Fourth Proportional to 12,988.14, 17,919.44 and 7,947.11

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Solution

The fourth proportional to 12,988.14, 17,919.44 and 7,947.11 is: 10,964.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,988.14 : 17,919.44 = 7,947.11 : x
  2. Step 2: Convert to fraction form
    12,988.14/17,919.44 = 7,947.11/x
  3. Step 3: Cross multiply
    12,988.14x = 17,919.44 × 7,947.11
  4. Step 4: Simplify right side
    12,988.14x = 142,407,631.49
  5. Step 5: Solve for x
    x = 142,407,631.49/12,988.14
  6. Step 6: Final answer
    x = 10,964.44

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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.