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Finding the Fourth Proportional to 21,780.44, 32,667.59 and 6,987.44

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Solution

The fourth proportional to 21,780.44, 32,667.59 and 6,987.44 is: 10,480.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.44 : 32,667.59 = 6,987.44 : x
  2. Step 2: Convert to fraction form
    21,780.44/32,667.59 = 6,987.44/x
  3. Step 3: Cross multiply
    21,780.44x = 32,667.59 × 6,987.44
  4. Step 4: Simplify right side
    21,780.44x = 228,262,626.79
  5. Step 5: Solve for x
    x = 228,262,626.79/21,780.44
  6. Step 6: Final answer
    x = 10,480.17

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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.