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Finding the Fourth Proportional to 15,375.20, 21,203.56 and 11,406.20

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Solution

The fourth proportional to 15,375.20, 21,203.56 and 11,406.20 is: 15,730.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,375.20 : 21,203.56 = 11,406.20 : x
  2. Step 2: Convert to fraction form
    15,375.20/21,203.56 = 11,406.20/x
  3. Step 3: Cross multiply
    15,375.20x = 21,203.56 × 11,406.20
  4. Step 4: Simplify right side
    15,375.20x = 241,852,046.07
  5. Step 5: Solve for x
    x = 241,852,046.07/15,375.20
  6. Step 6: Final answer
    x = 15,730.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.