Home / 20,320.47-30,458.84-13,278.33

Finding the Fourth Proportional to 20,320.47, 30,458.84 and 13,278.33

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Solution

The fourth proportional to 20,320.47, 30,458.84 and 13,278.33 is: 19,903.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.47 : 30,458.84 = 13,278.33 : x
  2. Step 2: Convert to fraction form
    20,320.47/30,458.84 = 13,278.33/x
  3. Step 3: Cross multiply
    20,320.47x = 30,458.84 × 13,278.33
  4. Step 4: Simplify right side
    20,320.47x = 404,442,462.55
  5. Step 5: Solve for x
    x = 404,442,462.55/20,320.47
  6. Step 6: Final answer
    x = 19,903.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.