Home / 30,639.60-45,979.92-13,113.72

Finding the Fourth Proportional to 30,639.60, 45,979.92 and 13,113.72

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Solution

The fourth proportional to 30,639.60, 45,979.92 and 13,113.72 is: 19,679.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,639.60 : 45,979.92 = 13,113.72 : x
  2. Step 2: Convert to fraction form
    30,639.60/45,979.92 = 13,113.72/x
  3. Step 3: Cross multiply
    30,639.60x = 45,979.92 × 13,113.72
  4. Step 4: Simplify right side
    30,639.60x = 602,967,796.50
  5. Step 5: Solve for x
    x = 602,967,796.50/30,639.60
  6. Step 6: Final answer
    x = 19,679.36

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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.