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Finding the Fourth Proportional to 21,990.66, 32,999.36 and 9,508.29

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Solution

The fourth proportional to 21,990.66, 32,999.36 and 9,508.29 is: 14,268.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.66 : 32,999.36 = 9,508.29 : x
  2. Step 2: Convert to fraction form
    21,990.66/32,999.36 = 9,508.29/x
  3. Step 3: Cross multiply
    21,990.66x = 32,999.36 × 9,508.29
  4. Step 4: Simplify right side
    21,990.66x = 313,767,437.15
  5. Step 5: Solve for x
    x = 313,767,437.15/21,990.66
  6. Step 6: Final answer
    x = 14,268.21

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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.