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Finding the Fourth Proportional to 10,139.04, 15,208.56 and 3,213

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Solution

The fourth proportional to 10,139.04, 15,208.56 and 3,213 is: 4,819.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,139.04 : 15,208.56 = 3,213 : x
  2. Step 2: Convert to fraction form
    10,139.04/15,208.56 = 3,213/x
  3. Step 3: Cross multiply
    10,139.04x = 15,208.56 × 3,213
  4. Step 4: Simplify right side
    10,139.04x = 48,865,103.28
  5. Step 5: Solve for x
    x = 48,865,103.28/10,139.04
  6. Step 6: Final answer
    x = 4,819.50

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.