Home / 13,290.28-18,339.82-7,320.78

Finding the Fourth Proportional to 13,290.28, 18,339.82 and 7,320.78

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Solution

The fourth proportional to 13,290.28, 18,339.82 and 7,320.78 is: 10,102.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,290.28 : 18,339.82 = 7,320.78 : x
  2. Step 2: Convert to fraction form
    13,290.28/18,339.82 = 7,320.78/x
  3. Step 3: Cross multiply
    13,290.28x = 18,339.82 × 7,320.78
  4. Step 4: Simplify right side
    13,290.28x = 134,261,769.16
  5. Step 5: Solve for x
    x = 134,261,769.16/13,290.28
  6. Step 6: Final answer
    x = 10,102.25

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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.