Home / 30,639.88-45,916.62-13,958.92

Finding the Fourth Proportional to 30,639.88, 45,916.62 and 13,958.92

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Solution

The fourth proportional to 30,639.88, 45,916.62 and 13,958.92 is: 20,918.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,639.88 : 45,916.62 = 13,958.92 : x
  2. Step 2: Convert to fraction form
    30,639.88/45,916.62 = 13,958.92/x
  3. Step 3: Cross multiply
    30,639.88x = 45,916.62 × 13,958.92
  4. Step 4: Simplify right side
    30,639.88x = 640,946,425.25
  5. Step 5: Solve for x
    x = 640,946,425.25/30,639.88
  6. Step 6: Final answer
    x = 20,918.70

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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.