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Finding the Fourth Proportional to 21,995.76, 32,990.13 and 6,409.74

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Solution

The fourth proportional to 21,995.76, 32,990.13 and 6,409.74 is: 9,613.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,995.76 : 32,990.13 = 6,409.74 : x
  2. Step 2: Convert to fraction form
    21,995.76/32,990.13 = 6,409.74/x
  3. Step 3: Cross multiply
    21,995.76x = 32,990.13 × 6,409.74
  4. Step 4: Simplify right side
    21,995.76x = 211,458,155.87
  5. Step 5: Solve for x
    x = 211,458,155.87/21,995.76
  6. Step 6: Final answer
    x = 9,613.59

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1.5x scale

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.