Home / 13,478.31-18,581.94-9,439.72

Finding the Fourth Proportional to 13,478.31, 18,581.94 and 9,439.72

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Solution

The fourth proportional to 13,478.31, 18,581.94 and 9,439.72 is: 13,014.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.31 : 18,581.94 = 9,439.72 : x
  2. Step 2: Convert to fraction form
    13,478.31/18,581.94 = 9,439.72/x
  3. Step 3: Cross multiply
    13,478.31x = 18,581.94 × 9,439.72
  4. Step 4: Simplify right side
    13,478.31x = 175,408,264.20
  5. Step 5: Solve for x
    x = 175,408,264.20/13,478.31
  6. Step 6: Final answer
    x = 13,014.11

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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.