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Finding the Fourth Proportional to 21,888.68, 30,203.34 and 12,326.96

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Solution

The fourth proportional to 21,888.68, 30,203.34 and 12,326.96 is: 17,009.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,888.68 : 30,203.34 = 12,326.96 : x
  2. Step 2: Convert to fraction form
    21,888.68/30,203.34 = 12,326.96/x
  3. Step 3: Cross multiply
    21,888.68x = 30,203.34 × 12,326.96
  4. Step 4: Simplify right side
    21,888.68x = 372,315,364.05
  5. Step 5: Solve for x
    x = 372,315,364.05/21,888.68
  6. Step 6: Final answer
    x = 17,009.49

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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.