Home / 21,092.16-31,622.49-12,770.18

Finding the Fourth Proportional to 21,092.16, 31,622.49 and 12,770.18

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Solution

The fourth proportional to 21,092.16, 31,622.49 and 12,770.18 is: 19,145.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,092.16 : 31,622.49 = 12,770.18 : x
  2. Step 2: Convert to fraction form
    21,092.16/31,622.49 = 12,770.18/x
  3. Step 3: Cross multiply
    21,092.16x = 31,622.49 × 12,770.18
  4. Step 4: Simplify right side
    21,092.16x = 403,824,889.35
  5. Step 5: Solve for x
    x = 403,824,889.35/21,092.16
  6. Step 6: Final answer
    x = 19,145.73

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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.