Home / 20,240.47-30,360.71-9,145.09

Finding the Fourth Proportional to 20,240.47, 30,360.71 and 9,145.09

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Solution

The fourth proportional to 20,240.47, 30,360.71 and 9,145.09 is: 13,717.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.47 : 30,360.71 = 9,145.09 : x
  2. Step 2: Convert to fraction form
    20,240.47/30,360.71 = 9,145.09/x
  3. Step 3: Cross multiply
    20,240.47x = 30,360.71 × 9,145.09
  4. Step 4: Simplify right side
    20,240.47x = 277,651,425.41
  5. Step 5: Solve for x
    x = 277,651,425.41/20,240.47
  6. Step 6: Final answer
    x = 13,717.64

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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.