Home / 20,320.40-28,041.96-11,367.80

Finding the Fourth Proportional to 20,320.40, 28,041.96 and 11,367.80

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Solution

The fourth proportional to 20,320.40, 28,041.96 and 11,367.80 is: 15,687.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.40 : 28,041.96 = 11,367.80 : x
  2. Step 2: Convert to fraction form
    20,320.40/28,041.96 = 11,367.80/x
  3. Step 3: Cross multiply
    20,320.40x = 28,041.96 × 11,367.80
  4. Step 4: Simplify right side
    20,320.40x = 318,775,392.89
  5. Step 5: Solve for x
    x = 318,775,392.89/20,320.40
  6. Step 6: Final answer
    x = 15,687.46

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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.