Home / 20,296.78-28,013.24-12,749.81

Finding the Fourth Proportional to 20,296.78, 28,013.24 and 12,749.81

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Solution

The fourth proportional to 20,296.78, 28,013.24 and 12,749.81 is: 17,597.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,296.78 : 28,013.24 = 12,749.81 : x
  2. Step 2: Convert to fraction form
    20,296.78/28,013.24 = 12,749.81/x
  3. Step 3: Cross multiply
    20,296.78x = 28,013.24 × 12,749.81
  4. Step 4: Simplify right side
    20,296.78x = 357,163,379.29
  5. Step 5: Solve for x
    x = 357,163,379.29/20,296.78
  6. Step 6: Final answer
    x = 17,597.05

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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.