Home / 13,278.28-18,325.06-7,311.08

Finding the Fourth Proportional to 13,278.28, 18,325.06 and 7,311.08

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Solution

The fourth proportional to 13,278.28, 18,325.06 and 7,311.08 is: 10,089.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.28 : 18,325.06 = 7,311.08 : x
  2. Step 2: Convert to fraction form
    13,278.28/18,325.06 = 7,311.08/x
  3. Step 3: Cross multiply
    13,278.28x = 18,325.06 × 7,311.08
  4. Step 4: Simplify right side
    13,278.28x = 133,975,979.66
  5. Step 5: Solve for x
    x = 133,975,979.66/13,278.28
  6. Step 6: Final answer
    x = 10,089.86

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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.