Home / 13,145.12-18,139.92-7,176.48

Finding the Fourth Proportional to 13,145.12, 18,139.92 and 7,176.48

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Solution

The fourth proportional to 13,145.12, 18,139.92 and 7,176.48 is: 9,903.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.12 : 18,139.92 = 7,176.48 : x
  2. Step 2: Convert to fraction form
    13,145.12/18,139.92 = 7,176.48/x
  3. Step 3: Cross multiply
    13,145.12x = 18,139.92 × 7,176.48
  4. Step 4: Simplify right side
    13,145.12x = 130,180,773.08
  5. Step 5: Solve for x
    x = 130,180,773.08/13,145.12
  6. Step 6: Final answer
    x = 9,903.35

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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.