Home / 13,258.78-19,887.70-3,398.15

Finding the Fourth Proportional to 13,258.78, 19,887.70 and 3,398.15

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Solution

The fourth proportional to 13,258.78, 19,887.70 and 3,398.15 is: 5,097.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,258.78 : 19,887.70 = 3,398.15 : x
  2. Step 2: Convert to fraction form
    13,258.78/19,887.70 = 3,398.15/x
  3. Step 3: Cross multiply
    13,258.78x = 19,887.70 × 3,398.15
  4. Step 4: Simplify right side
    13,258.78x = 67,581,387.76
  5. Step 5: Solve for x
    x = 67,581,387.76/13,258.78
  6. Step 6: Final answer
    x = 5,097.10

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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.