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Finding the Fourth Proportional to 6,521.28, 8,990.90 and 4,159.32

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Solution

The fourth proportional to 6,521.28, 8,990.90 and 4,159.32 is: 5,734.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,521.28 : 8,990.90 = 4,159.32 : x
  2. Step 2: Convert to fraction form
    6,521.28/8,990.90 = 4,159.32/x
  3. Step 3: Cross multiply
    6,521.28x = 8,990.90 × 4,159.32
  4. Step 4: Simplify right side
    6,521.28x = 37,396,030.19
  5. Step 5: Solve for x
    x = 37,396,030.19/6,521.28
  6. Step 6: Final answer
    x = 5,734.46

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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.