Home / 20,918.14-28,867.50-11,486.70

Finding the Fourth Proportional to 20,918.14, 28,867.50 and 11,486.70

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Solution

The fourth proportional to 20,918.14, 28,867.50 and 11,486.70 is: 15,851.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.14 : 28,867.50 = 11,486.70 : x
  2. Step 2: Convert to fraction form
    20,918.14/28,867.50 = 11,486.70/x
  3. Step 3: Cross multiply
    20,918.14x = 28,867.50 × 11,486.70
  4. Step 4: Simplify right side
    20,918.14x = 331,592,312.25
  5. Step 5: Solve for x
    x = 331,592,312.25/20,918.14
  6. Step 6: Final answer
    x = 15,851.90

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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.