Home / 13,439.87-20,059.12-13,218.16

Finding the Fourth Proportional to 13,439.87, 20,059.12 and 13,218.16

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Solution

The fourth proportional to 13,439.87, 20,059.12 and 13,218.16 is: 19,728.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,439.87 : 20,059.12 = 13,218.16 : x
  2. Step 2: Convert to fraction form
    13,439.87/20,059.12 = 13,218.16/x
  3. Step 3: Cross multiply
    13,439.87x = 20,059.12 × 13,218.16
  4. Step 4: Simplify right side
    13,439.87x = 265,144,553.91
  5. Step 5: Solve for x
    x = 265,144,553.91/13,439.87
  6. Step 6: Final answer
    x = 19,728.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.