Home / 20,302.31-28,017.05-11,349.78

Finding the Fourth Proportional to 20,302.31, 28,017.05 and 11,349.78

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Solution

The fourth proportional to 20,302.31, 28,017.05 and 11,349.78 is: 15,662.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,302.31 : 28,017.05 = 11,349.78 : x
  2. Step 2: Convert to fraction form
    20,302.31/28,017.05 = 11,349.78/x
  3. Step 3: Cross multiply
    20,302.31x = 28,017.05 × 11,349.78
  4. Step 4: Simplify right side
    20,302.31x = 317,987,382.12
  5. Step 5: Solve for x
    x = 317,987,382.12/20,302.31
  6. Step 6: Final answer
    x = 15,662.62

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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.