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Finding the Fourth Proportional to 6,521.60, 8,999.84 and 3,869.16

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Solution

The fourth proportional to 6,521.60, 8,999.84 and 3,869.16 is: 5,339.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,521.60 : 8,999.84 = 3,869.16 : x
  2. Step 2: Convert to fraction form
    6,521.60/8,999.84 = 3,869.16/x
  3. Step 3: Cross multiply
    6,521.60x = 8,999.84 × 3,869.16
  4. Step 4: Simplify right side
    6,521.60x = 34,821,820.93
  5. Step 5: Solve for x
    x = 34,821,820.93/6,521.60
  6. Step 6: Final answer
    x = 5,339.46

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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.