Home / 20,914.20-28,860.95-11,353.63

Finding the Fourth Proportional to 20,914.20, 28,860.95 and 11,353.63

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Solution

The fourth proportional to 20,914.20, 28,860.95 and 11,353.63 is: 15,667.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,914.20 : 28,860.95 = 11,353.63 : x
  2. Step 2: Convert to fraction form
    20,914.20/28,860.95 = 11,353.63/x
  3. Step 3: Cross multiply
    20,914.20x = 28,860.95 × 11,353.63
  4. Step 4: Simplify right side
    20,914.20x = 327,676,547.75
  5. Step 5: Solve for x
    x = 327,676,547.75/20,914.20
  6. Step 6: Final answer
    x = 15,667.66

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Half scale
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Double scale
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Similar ratio
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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.