Home / 20,971.62-28,941.04-11,540.40

Finding the Fourth Proportional to 20,971.62, 28,941.04 and 11,540.40

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Solution

The fourth proportional to 20,971.62, 28,941.04 and 11,540.40 is: 15,925.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.62 : 28,941.04 = 11,540.40 : x
  2. Step 2: Convert to fraction form
    20,971.62/28,941.04 = 11,540.40/x
  3. Step 3: Cross multiply
    20,971.62x = 28,941.04 × 11,540.40
  4. Step 4: Simplify right side
    20,971.62x = 333,991,178.02
  5. Step 5: Solve for x
    x = 333,991,178.02/20,971.62
  6. Step 6: Final answer
    x = 15,925.86

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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.