Home / 20,320.40-28,043.24-11,367.36

Finding the Fourth Proportional to 20,320.40, 28,043.24 and 11,367.36

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Solution

The fourth proportional to 20,320.40, 28,043.24 and 11,367.36 is: 15,687.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.40 : 28,043.24 = 11,367.36 : x
  2. Step 2: Convert to fraction form
    20,320.40/28,043.24 = 11,367.36/x
  3. Step 3: Cross multiply
    20,320.40x = 28,043.24 × 11,367.36
  4. Step 4: Simplify right side
    20,320.40x = 318,777,547.81
  5. Step 5: Solve for x
    x = 318,777,547.81/20,320.40
  6. Step 6: Final answer
    x = 15,687.56

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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.