Home / 20,320.34-28,040.75-11,366.31

Finding the Fourth Proportional to 20,320.34, 28,040.75 and 11,366.31

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Solution

The fourth proportional to 20,320.34, 28,040.75 and 11,366.31 is: 15,684.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.34 : 28,040.75 = 11,366.31 : x
  2. Step 2: Convert to fraction form
    20,320.34/28,040.75 = 11,366.31/x
  3. Step 3: Cross multiply
    20,320.34x = 28,040.75 × 11,366.31
  4. Step 4: Simplify right side
    20,320.34x = 318,719,857.13
  5. Step 5: Solve for x
    x = 318,719,857.13/20,320.34
  6. Step 6: Final answer
    x = 15,684.77

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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.