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Finding the Fourth Proportional to 8,980.65, 13,538.18 and 8,378.53

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Solution

The fourth proportional to 8,980.65, 13,538.18 and 8,378.53 is: 12,630.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,980.65 : 13,538.18 = 8,378.53 : x
  2. Step 2: Convert to fraction form
    8,980.65/13,538.18 = 8,378.53/x
  3. Step 3: Cross multiply
    8,980.65x = 13,538.18 × 8,378.53
  4. Step 4: Simplify right side
    8,980.65x = 113,430,034.38
  5. Step 5: Solve for x
    x = 113,430,034.38/8,980.65
  6. Step 6: Final answer
    x = 12,630.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.