Home / 13,730.31-18,947.82-7,442.68

Finding the Fourth Proportional to 13,730.31, 18,947.82 and 7,442.68

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Solution

The fourth proportional to 13,730.31, 18,947.82 and 7,442.68 is: 10,270.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,730.31 : 18,947.82 = 7,442.68 : x
  2. Step 2: Convert to fraction form
    13,730.31/18,947.82 = 7,442.68/x
  3. Step 3: Cross multiply
    13,730.31x = 18,947.82 × 7,442.68
  4. Step 4: Simplify right side
    13,730.31x = 141,022,560.96
  5. Step 5: Solve for x
    x = 141,022,560.96/13,730.31
  6. Step 6: Final answer
    x = 10,270.89

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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.