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Finding the Fourth Proportional to 13,246.71, 18,280.45 and 7,278.76

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Solution

The fourth proportional to 13,246.71, 18,280.45 and 7,278.76 is: 10,044.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,246.71 : 18,280.45 = 7,278.76 : x
  2. Step 2: Convert to fraction form
    13,246.71/18,280.45 = 7,278.76/x
  3. Step 3: Cross multiply
    13,246.71x = 18,280.45 × 7,278.76
  4. Step 4: Simplify right side
    13,246.71x = 133,059,055.54
  5. Step 5: Solve for x
    x = 133,059,055.54/13,246.71
  6. Step 6: Final answer
    x = 10,044.69

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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.