Home / 21,402.52-31,961.55-21,170.84

Finding the Fourth Proportional to 21,402.52, 31,961.55 and 21,170.84

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Solution

The fourth proportional to 21,402.52, 31,961.55 and 21,170.84 is: 31,615.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,402.52 : 31,961.55 = 21,170.84 : x
  2. Step 2: Convert to fraction form
    21,402.52/31,961.55 = 21,170.84/x
  3. Step 3: Cross multiply
    21,402.52x = 31,961.55 × 21,170.84
  4. Step 4: Simplify right side
    21,402.52x = 676,652,861.20
  5. Step 5: Solve for x
    x = 676,652,861.20/21,402.52
  6. Step 6: Final answer
    x = 31,615.57

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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.