Home / 21,227.68-31,840.98-10,142.20

Finding the Fourth Proportional to 21,227.68, 31,840.98 and 10,142.20

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Solution

The fourth proportional to 21,227.68, 31,840.98 and 10,142.20 is: 15,213.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,227.68 : 31,840.98 = 10,142.20 : x
  2. Step 2: Convert to fraction form
    21,227.68/31,840.98 = 10,142.20/x
  3. Step 3: Cross multiply
    21,227.68x = 31,840.98 × 10,142.20
  4. Step 4: Simplify right side
    21,227.68x = 322,937,587.36
  5. Step 5: Solve for x
    x = 322,937,587.36/21,227.68
  6. Step 6: Final answer
    x = 15,213.04

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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.