Home / 23,130.75-31,920.65-12,520.56

Finding the Fourth Proportional to 23,130.75, 31,920.65 and 12,520.56

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Solution

The fourth proportional to 23,130.75, 31,920.65 and 12,520.56 is: 17,278.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,130.75 : 31,920.65 = 12,520.56 : x
  2. Step 2: Convert to fraction form
    23,130.75/31,920.65 = 12,520.56/x
  3. Step 3: Cross multiply
    23,130.75x = 31,920.65 × 12,520.56
  4. Step 4: Simplify right side
    23,130.75x = 399,664,413.56
  5. Step 5: Solve for x
    x = 399,664,413.56/23,130.75
  6. Step 6: Final answer
    x = 17,278.49

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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.