Home / 20,886.33-28,807.59-13,620.02

Finding the Fourth Proportional to 20,886.33, 28,807.59 and 13,620.02

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Solution

The fourth proportional to 20,886.33, 28,807.59 and 13,620.02 is: 18,785.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,886.33 : 28,807.59 = 13,620.02 : x
  2. Step 2: Convert to fraction form
    20,886.33/28,807.59 = 13,620.02/x
  3. Step 3: Cross multiply
    20,886.33x = 28,807.59 × 13,620.02
  4. Step 4: Simplify right side
    20,886.33x = 392,359,807.91
  5. Step 5: Solve for x
    x = 392,359,807.91/20,886.33
  6. Step 6: Final answer
    x = 18,785.48

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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.