Home / 20,129.93-27,805.45-15,320.66

Finding the Fourth Proportional to 20,129.93, 27,805.45 and 15,320.66

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Solution

The fourth proportional to 20,129.93, 27,805.45 and 15,320.66 is: 21,162.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.93 : 27,805.45 = 15,320.66 : x
  2. Step 2: Convert to fraction form
    20,129.93/27,805.45 = 15,320.66/x
  3. Step 3: Cross multiply
    20,129.93x = 27,805.45 × 15,320.66
  4. Step 4: Simplify right side
    20,129.93x = 425,997,845.60
  5. Step 5: Solve for x
    x = 425,997,845.60/20,129.93
  6. Step 6: Final answer
    x = 21,162.41

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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.