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Finding the Fourth Proportional to 15,203.12, 20,963.76 and 9,888.08

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Solution

The fourth proportional to 15,203.12, 20,963.76 and 9,888.08 is: 13,634.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,203.12 : 20,963.76 = 9,888.08 : x
  2. Step 2: Convert to fraction form
    15,203.12/20,963.76 = 9,888.08/x
  3. Step 3: Cross multiply
    15,203.12x = 20,963.76 × 9,888.08
  4. Step 4: Simplify right side
    15,203.12x = 207,291,231.16
  5. Step 5: Solve for x
    x = 207,291,231.16/15,203.12
  6. Step 6: Final answer
    x = 13,634.79

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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.