Home / 20,280.68-30,436.71-13,258.79

Finding the Fourth Proportional to 20,280.68, 30,436.71 and 13,258.79

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Solution

The fourth proportional to 20,280.68, 30,436.71 and 13,258.79 is: 19,898.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.68 : 30,436.71 = 13,258.79 : x
  2. Step 2: Convert to fraction form
    20,280.68/30,436.71 = 13,258.79/x
  3. Step 3: Cross multiply
    20,280.68x = 30,436.71 × 13,258.79
  4. Step 4: Simplify right side
    20,280.68x = 403,553,933.00
  5. Step 5: Solve for x
    x = 403,553,933.00/20,280.68
  6. Step 6: Final answer
    x = 19,898.44

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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.