Home / 22,768.32-31,413.12-13,689.60

Finding the Fourth Proportional to 22,768.32, 31,413.12 and 13,689.60

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Solution

The fourth proportional to 22,768.32, 31,413.12 and 13,689.60 is: 18,887.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,768.32 : 31,413.12 = 13,689.60 : x
  2. Step 2: Convert to fraction form
    22,768.32/31,413.12 = 13,689.60/x
  3. Step 3: Cross multiply
    22,768.32x = 31,413.12 × 13,689.60
  4. Step 4: Simplify right side
    22,768.32x = 430,033,047.55
  5. Step 5: Solve for x
    x = 430,033,047.55/22,768.32
  6. Step 6: Final answer
    x = 18,887.34

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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.