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Finding the Fourth Proportional to 21,992.16, 32,989.65 and 7,758.89

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Solution

The fourth proportional to 21,992.16, 32,989.65 and 7,758.89 is: 11,638.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,992.16 : 32,989.65 = 7,758.89 : x
  2. Step 2: Convert to fraction form
    21,992.16/32,989.65 = 7,758.89/x
  3. Step 3: Cross multiply
    21,992.16x = 32,989.65 × 7,758.89
  4. Step 4: Simplify right side
    21,992.16x = 255,963,065.49
  5. Step 5: Solve for x
    x = 255,963,065.49/21,992.16
  6. Step 6: Final answer
    x = 11,638.83

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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.