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Finding the Fourth Proportional to 8,720.65, 12,034.45 and 4,741.69

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Solution

The fourth proportional to 8,720.65, 12,034.45 and 4,741.69 is: 6,543.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.65 : 12,034.45 = 4,741.69 : x
  2. Step 2: Convert to fraction form
    8,720.65/12,034.45 = 4,741.69/x
  3. Step 3: Cross multiply
    8,720.65x = 12,034.45 × 4,741.69
  4. Step 4: Simplify right side
    8,720.65x = 57,063,631.22
  5. Step 5: Solve for x
    x = 57,063,631.22/8,720.65
  6. Step 6: Final answer
    x = 6,543.51

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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.