Home / 20,309.40-28,026.78-11,356.80

Finding the Fourth Proportional to 20,309.40, 28,026.78 and 11,356.80

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Solution

The fourth proportional to 20,309.40, 28,026.78 and 11,356.80 is: 15,672.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,309.40 : 28,026.78 = 11,356.80 : x
  2. Step 2: Convert to fraction form
    20,309.40/28,026.78 = 11,356.80/x
  3. Step 3: Cross multiply
    20,309.40x = 28,026.78 × 11,356.80
  4. Step 4: Simplify right side
    20,309.40x = 318,294,535.10
  5. Step 5: Solve for x
    x = 318,294,535.10/20,309.40
  6. Step 6: Final answer
    x = 15,672.28

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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.