Home / 13,688.11-18,872.48-11,422.70

Finding the Fourth Proportional to 13,688.11, 18,872.48 and 11,422.70

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Solution

The fourth proportional to 13,688.11, 18,872.48 and 11,422.70 is: 15,749.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,688.11 : 18,872.48 = 11,422.70 : x
  2. Step 2: Convert to fraction form
    13,688.11/18,872.48 = 11,422.70/x
  3. Step 3: Cross multiply
    13,688.11x = 18,872.48 × 11,422.70
  4. Step 4: Simplify right side
    13,688.11x = 215,574,710.20
  5. Step 5: Solve for x
    x = 215,574,710.20/13,688.11
  6. Step 6: Final answer
    x = 15,749.05

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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.