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Finding the Fourth Proportional to 21,888.90, 32,784.09 and 15,344.31

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Solution

The fourth proportional to 21,888.90, 32,784.09 and 15,344.31 is: 22,981.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,888.90 : 32,784.09 = 15,344.31 : x
  2. Step 2: Convert to fraction form
    21,888.90/32,784.09 = 15,344.31/x
  3. Step 3: Cross multiply
    21,888.90x = 32,784.09 × 15,344.31
  4. Step 4: Simplify right side
    21,888.90x = 503,049,240.03
  5. Step 5: Solve for x
    x = 503,049,240.03/21,888.90
  6. Step 6: Final answer
    x = 22,981.93

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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.