Home / 20,342.76-28,085.70-15,617.64

Finding the Fourth Proportional to 20,342.76, 28,085.70 and 15,617.64

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Solution

The fourth proportional to 20,342.76, 28,085.70 and 15,617.64 is: 21,562.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.76 : 28,085.70 = 15,617.64 : x
  2. Step 2: Convert to fraction form
    20,342.76/28,085.70 = 15,617.64/x
  3. Step 3: Cross multiply
    20,342.76x = 28,085.70 × 15,617.64
  4. Step 4: Simplify right side
    20,342.76x = 438,632,351.75
  5. Step 5: Solve for x
    x = 438,632,351.75/20,342.76
  6. Step 6: Final answer
    x = 21,562.09

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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.