Home / 21,189.71-29,247.47-13,227.14

Finding the Fourth Proportional to 21,189.71, 29,247.47 and 13,227.14

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Solution

The fourth proportional to 21,189.71, 29,247.47 and 13,227.14 is: 18,256.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.71 : 29,247.47 = 13,227.14 : x
  2. Step 2: Convert to fraction form
    21,189.71/29,247.47 = 13,227.14/x
  3. Step 3: Cross multiply
    21,189.71x = 29,247.47 × 13,227.14
  4. Step 4: Simplify right side
    21,189.71x = 386,860,380.34
  5. Step 5: Solve for x
    x = 386,860,380.34/21,189.71
  6. Step 6: Final answer
    x = 18,256.99

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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.