Home / 20,955.38-28,913.35-13,295.86

Finding the Fourth Proportional to 20,955.38, 28,913.35 and 13,295.86

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Solution

The fourth proportional to 20,955.38, 28,913.35 and 13,295.86 is: 18,345.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,955.38 : 28,913.35 = 13,295.86 : x
  2. Step 2: Convert to fraction form
    20,955.38/28,913.35 = 13,295.86/x
  3. Step 3: Cross multiply
    20,955.38x = 28,913.35 × 13,295.86
  4. Step 4: Simplify right side
    20,955.38x = 384,427,853.73
  5. Step 5: Solve for x
    x = 384,427,853.73/20,955.38
  6. Step 6: Final answer
    x = 18,345.07

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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.