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Finding the Fourth Proportional to 21,988.31, 32,975.62 and 7,193.93

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Solution

The fourth proportional to 21,988.31, 32,975.62 and 7,193.93 is: 10,788.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.31 : 32,975.62 = 7,193.93 : x
  2. Step 2: Convert to fraction form
    21,988.31/32,975.62 = 7,193.93/x
  3. Step 3: Cross multiply
    21,988.31x = 32,975.62 × 7,193.93
  4. Step 4: Simplify right side
    21,988.31x = 237,224,366.44
  5. Step 5: Solve for x
    x = 237,224,366.44/21,988.31
  6. Step 6: Final answer
    x = 10,788.66

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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.