Home / 20,697.72-28,508.45-15,908.51

Finding the Fourth Proportional to 20,697.72, 28,508.45 and 15,908.51

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Solution

The fourth proportional to 20,697.72, 28,508.45 and 15,908.51 is: 21,911.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.72 : 28,508.45 = 15,908.51 : x
  2. Step 2: Convert to fraction form
    20,697.72/28,508.45 = 15,908.51/x
  3. Step 3: Cross multiply
    20,697.72x = 28,508.45 × 15,908.51
  4. Step 4: Simplify right side
    20,697.72x = 453,526,811.10
  5. Step 5: Solve for x
    x = 453,526,811.10/20,697.72
  6. Step 6: Final answer
    x = 21,911.92

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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.