Home / 21,135.12-29,161.80-15,834.48

Finding the Fourth Proportional to 21,135.12, 29,161.80 and 15,834.48

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Solution

The fourth proportional to 21,135.12, 29,161.80 and 15,834.48 is: 21,848.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.12 : 29,161.80 = 15,834.48 : x
  2. Step 2: Convert to fraction form
    21,135.12/29,161.80 = 15,834.48/x
  3. Step 3: Cross multiply
    21,135.12x = 29,161.80 × 15,834.48
  4. Step 4: Simplify right side
    21,135.12x = 461,761,938.86
  5. Step 5: Solve for x
    x = 461,761,938.86/21,135.12
  6. Step 6: Final answer
    x = 21,848.09

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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.