Home / 20,371.32-28,112.40-12,413.57

Finding the Fourth Proportional to 20,371.32, 28,112.40 and 12,413.57

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Solution

The fourth proportional to 20,371.32, 28,112.40 and 12,413.57 is: 17,130.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,371.32 : 28,112.40 = 12,413.57 : x
  2. Step 2: Convert to fraction form
    20,371.32/28,112.40 = 12,413.57/x
  3. Step 3: Cross multiply
    20,371.32x = 28,112.40 × 12,413.57
  4. Step 4: Simplify right side
    20,371.32x = 348,975,104.71
  5. Step 5: Solve for x
    x = 348,975,104.71/20,371.32
  6. Step 6: Final answer
    x = 17,130.71

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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.