Home / 21,272.17-31,689.96-20,312.62

Finding the Fourth Proportional to 21,272.17, 31,689.96 and 20,312.62

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Solution

The fourth proportional to 21,272.17, 31,689.96 and 20,312.62 is: 30,260.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.17 : 31,689.96 = 20,312.62 : x
  2. Step 2: Convert to fraction form
    21,272.17/31,689.96 = 20,312.62/x
  3. Step 3: Cross multiply
    21,272.17x = 31,689.96 × 20,312.62
  4. Step 4: Simplify right side
    21,272.17x = 643,706,013.73
  5. Step 5: Solve for x
    x = 643,706,013.73/21,272.17
  6. Step 6: Final answer
    x = 30,260.48

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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.