Home / 20,912.63-28,857.51-12,413.30

Finding the Fourth Proportional to 20,912.63, 28,857.51 and 12,413.30

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Solution

The fourth proportional to 20,912.63, 28,857.51 and 12,413.30 is: 17,129.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.63 : 28,857.51 = 12,413.30 : x
  2. Step 2: Convert to fraction form
    20,912.63/28,857.51 = 12,413.30/x
  3. Step 3: Cross multiply
    20,912.63x = 28,857.51 × 12,413.30
  4. Step 4: Simplify right side
    20,912.63x = 358,216,892.81
  5. Step 5: Solve for x
    x = 358,216,892.81/20,912.63
  6. Step 6: Final answer
    x = 17,129.21

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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.