Home / 21,677.90-32,531.63-9,991.22

Finding the Fourth Proportional to 21,677.90, 32,531.63 and 9,991.22

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Solution

The fourth proportional to 21,677.90, 32,531.63 and 9,991.22 is: 14,993.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,677.90 : 32,531.63 = 9,991.22 : x
  2. Step 2: Convert to fraction form
    21,677.90/32,531.63 = 9,991.22/x
  3. Step 3: Cross multiply
    21,677.90x = 32,531.63 × 9,991.22
  4. Step 4: Simplify right side
    21,677.90x = 325,030,459.67
  5. Step 5: Solve for x
    x = 325,030,459.67/21,677.90
  6. Step 6: Final answer
    x = 14,993.64

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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.