Home / 13,132.16-18,120.32-7,542.08

Finding the Fourth Proportional to 13,132.16, 18,120.32 and 7,542.08

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Solution

The fourth proportional to 13,132.16, 18,120.32 and 7,542.08 is: 10,406.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,132.16 : 18,120.32 = 7,542.08 : x
  2. Step 2: Convert to fraction form
    13,132.16/18,120.32 = 7,542.08/x
  3. Step 3: Cross multiply
    13,132.16x = 18,120.32 × 7,542.08
  4. Step 4: Simplify right side
    13,132.16x = 136,664,903.07
  5. Step 5: Solve for x
    x = 136,664,903.07/13,132.16
  6. Step 6: Final answer
    x = 10,406.89

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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.