Home / 21,091.76-31,637.60-8,617.64

Finding the Fourth Proportional to 21,091.76, 31,637.60 and 8,617.64

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Solution

The fourth proportional to 21,091.76, 31,637.60 and 8,617.64 is: 12,926.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,091.76 : 31,637.60 = 8,617.64 : x
  2. Step 2: Convert to fraction form
    21,091.76/31,637.60 = 8,617.64/x
  3. Step 3: Cross multiply
    21,091.76x = 31,637.60 × 8,617.64
  4. Step 4: Simplify right side
    21,091.76x = 272,641,447.26
  5. Step 5: Solve for x
    x = 272,641,447.26/21,091.76
  6. Step 6: Final answer
    x = 12,926.44

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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.