Home / 20,828.53-31,387.69-18,854.76

Finding the Fourth Proportional to 20,828.53, 31,387.69 and 18,854.76

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Solution

The fourth proportional to 20,828.53, 31,387.69 and 18,854.76 is: 28,413.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.53 : 31,387.69 = 18,854.76 : x
  2. Step 2: Convert to fraction form
    20,828.53/31,387.69 = 18,854.76/x
  3. Step 3: Cross multiply
    20,828.53x = 31,387.69 × 18,854.76
  4. Step 4: Simplify right side
    20,828.53x = 591,807,361.90
  5. Step 5: Solve for x
    x = 591,807,361.90/20,828.53
  6. Step 6: Final answer
    x = 28,413.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.