Home / 13,389.20-18,473.76-7,725.68

Finding the Fourth Proportional to 13,389.20, 18,473.76 and 7,725.68

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Solution

The fourth proportional to 13,389.20, 18,473.76 and 7,725.68 is: 10,659.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,389.20 : 18,473.76 = 7,725.68 : x
  2. Step 2: Convert to fraction form
    13,389.20/18,473.76 = 7,725.68/x
  3. Step 3: Cross multiply
    13,389.20x = 18,473.76 × 7,725.68
  4. Step 4: Simplify right side
    13,389.20x = 142,722,358.16
  5. Step 5: Solve for x
    x = 142,722,358.16/13,389.20
  6. Step 6: Final answer
    x = 10,659.51

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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.