Home / 21,340.50-31,988.60-8,867.32

Finding the Fourth Proportional to 21,340.50, 31,988.60 and 8,867.32

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Solution

The fourth proportional to 21,340.50, 31,988.60 and 8,867.32 is: 13,291.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.50 : 31,988.60 = 8,867.32 : x
  2. Step 2: Convert to fraction form
    21,340.50/31,988.60 = 8,867.32/x
  3. Step 3: Cross multiply
    21,340.50x = 31,988.60 × 8,867.32
  4. Step 4: Simplify right side
    21,340.50x = 283,653,152.55
  5. Step 5: Solve for x
    x = 283,653,152.55/21,340.50
  6. Step 6: Final answer
    x = 13,291.78

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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.