Home / 13,275.66-18,320.67-7,689.90

Finding the Fourth Proportional to 13,275.66, 18,320.67 and 7,689.90

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Solution

The fourth proportional to 13,275.66, 18,320.67 and 7,689.90 is: 10,612.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,275.66 : 18,320.67 = 7,689.90 : x
  2. Step 2: Convert to fraction form
    13,275.66/18,320.67 = 7,689.90/x
  3. Step 3: Cross multiply
    13,275.66x = 18,320.67 × 7,689.90
  4. Step 4: Simplify right side
    13,275.66x = 140,884,120.23
  5. Step 5: Solve for x
    x = 140,884,120.23/13,275.66
  6. Step 6: Final answer
    x = 10,612.21

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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.