Home / 21,513.68-32,110.02-20,988.72

Finding the Fourth Proportional to 21,513.68, 32,110.02 and 20,988.72

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Solution

The fourth proportional to 21,513.68, 32,110.02 and 20,988.72 is: 31,326.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,513.68 : 32,110.02 = 20,988.72 : x
  2. Step 2: Convert to fraction form
    21,513.68/32,110.02 = 20,988.72/x
  3. Step 3: Cross multiply
    21,513.68x = 32,110.02 × 20,988.72
  4. Step 4: Simplify right side
    21,513.68x = 673,948,218.97
  5. Step 5: Solve for x
    x = 673,948,218.97/21,513.68
  6. Step 6: Final answer
    x = 31,326.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.