Home / 28,248.25-38,967.74-21,522.20

Finding the Fourth Proportional to 28,248.25, 38,967.74 and 21,522.20

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Solution

The fourth proportional to 28,248.25, 38,967.74 and 21,522.20 is: 29,689.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,248.25 : 38,967.74 = 21,522.20 : x
  2. Step 2: Convert to fraction form
    28,248.25/38,967.74 = 21,522.20/x
  3. Step 3: Cross multiply
    28,248.25x = 38,967.74 × 21,522.20
  4. Step 4: Simplify right side
    28,248.25x = 838,671,191.38
  5. Step 5: Solve for x
    x = 838,671,191.38/28,248.25
  6. Step 6: Final answer
    x = 29,689.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.