Home / 20,564.60-28,379.13-11,133.16

Finding the Fourth Proportional to 20,564.60, 28,379.13 and 11,133.16

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Solution

The fourth proportional to 20,564.60, 28,379.13 and 11,133.16 is: 15,363.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,564.60 : 28,379.13 = 11,133.16 : x
  2. Step 2: Convert to fraction form
    20,564.60/28,379.13 = 11,133.16/x
  3. Step 3: Cross multiply
    20,564.60x = 28,379.13 × 11,133.16
  4. Step 4: Simplify right side
    20,564.60x = 315,949,282.25
  5. Step 5: Solve for x
    x = 315,949,282.25/20,564.60
  6. Step 6: Final answer
    x = 15,363.75

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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.