Home / 20,313.11-28,031.79-11,360.53

Finding the Fourth Proportional to 20,313.11, 28,031.79 and 11,360.53

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Solution

The fourth proportional to 20,313.11, 28,031.79 and 11,360.53 is: 15,677.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,313.11 : 28,031.79 = 11,360.53 : x
  2. Step 2: Convert to fraction form
    20,313.11/28,031.79 = 11,360.53/x
  3. Step 3: Cross multiply
    20,313.11x = 28,031.79 × 11,360.53
  4. Step 4: Simplify right side
    20,313.11x = 318,455,991.25
  5. Step 5: Solve for x
    x = 318,455,991.25/20,313.11
  6. Step 6: Final answer
    x = 15,677.36

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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.