Home / 13,608.20-20,417.10-13,128.20

Finding the Fourth Proportional to 13,608.20, 20,417.10 and 13,128.20

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Solution

The fourth proportional to 13,608.20, 20,417.10 and 13,128.20 is: 19,696.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.20 : 20,417.10 = 13,128.20 : x
  2. Step 2: Convert to fraction form
    13,608.20/20,417.10 = 13,128.20/x
  3. Step 3: Cross multiply
    13,608.20x = 20,417.10 × 13,128.20
  4. Step 4: Simplify right side
    13,608.20x = 268,039,772.22
  5. Step 5: Solve for x
    x = 268,039,772.22/13,608.20
  6. Step 6: Final answer
    x = 19,696.93

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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.