Home / 20,367.78-28,124.64-15,323.23

Finding the Fourth Proportional to 20,367.78, 28,124.64 and 15,323.23

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Solution

The fourth proportional to 20,367.78, 28,124.64 and 15,323.23 is: 21,158.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,367.78 : 28,124.64 = 15,323.23 : x
  2. Step 2: Convert to fraction form
    20,367.78/28,124.64 = 15,323.23/x
  3. Step 3: Cross multiply
    20,367.78x = 28,124.64 × 15,323.23
  4. Step 4: Simplify right side
    20,367.78x = 430,960,327.39
  5. Step 5: Solve for x
    x = 430,960,327.39/20,367.78
  6. Step 6: Final answer
    x = 21,158.92

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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.