Home / 20,869.32-31,189.02-15,258.72

Finding the Fourth Proportional to 20,869.32, 31,189.02 and 15,258.72

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Solution

The fourth proportional to 20,869.32, 31,189.02 and 15,258.72 is: 22,804.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.32 : 31,189.02 = 15,258.72 : x
  2. Step 2: Convert to fraction form
    20,869.32/31,189.02 = 15,258.72/x
  3. Step 3: Cross multiply
    20,869.32x = 31,189.02 × 15,258.72
  4. Step 4: Simplify right side
    20,869.32x = 475,904,523.25
  5. Step 5: Solve for x
    x = 475,904,523.25/20,869.32
  6. Step 6: Final answer
    x = 22,804.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.