Home / 13,285.65-18,335.66-7,620.72

Finding the Fourth Proportional to 13,285.65, 18,335.66 and 7,620.72

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Solution

The fourth proportional to 13,285.65, 18,335.66 and 7,620.72 is: 10,517.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,285.65 : 18,335.66 = 7,620.72 : x
  2. Step 2: Convert to fraction form
    13,285.65/18,335.66 = 7,620.72/x
  3. Step 3: Cross multiply
    13,285.65x = 18,335.66 × 7,620.72
  4. Step 4: Simplify right side
    13,285.65x = 139,730,930.88
  5. Step 5: Solve for x
    x = 139,730,930.88/13,285.65
  6. Step 6: Final answer
    x = 10,517.43

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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.