Home / 20,703.17-28,555.87-12,749.78

Finding the Fourth Proportional to 20,703.17, 28,555.87 and 12,749.78

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Solution

The fourth proportional to 20,703.17, 28,555.87 and 12,749.78 is: 17,585.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,703.17 : 28,555.87 = 12,749.78 : x
  2. Step 2: Convert to fraction form
    20,703.17/28,555.87 = 12,749.78/x
  3. Step 3: Cross multiply
    20,703.17x = 28,555.87 × 12,749.78
  4. Step 4: Simplify right side
    20,703.17x = 364,081,060.21
  5. Step 5: Solve for x
    x = 364,081,060.21/20,703.17
  6. Step 6: Final answer
    x = 17,585.76

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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.