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Finding the Fourth Proportional to 5,980.79, 8,971.18 and 4,321.91

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Solution

The fourth proportional to 5,980.79, 8,971.18 and 4,321.91 is: 6,482.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,980.79 : 8,971.18 = 4,321.91 : x
  2. Step 2: Convert to fraction form
    5,980.79/8,971.18 = 4,321.91/x
  3. Step 3: Cross multiply
    5,980.79x = 8,971.18 × 4,321.91
  4. Step 4: Simplify right side
    5,980.79x = 38,772,632.55
  5. Step 5: Solve for x
    x = 38,772,632.55/5,980.79
  6. Step 6: Final answer
    x = 6,482.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.