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Finding the Fourth Proportional to 21,809, 32,712.78 and 7,018.76

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Solution

The fourth proportional to 21,809, 32,712.78 and 7,018.76 is: 10,527.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,809 : 32,712.78 = 7,018.76 : x
  2. Step 2: Convert to fraction form
    21,809/32,712.78 = 7,018.76/x
  3. Step 3: Cross multiply
    21,809x = 32,712.78 × 7,018.76
  4. Step 4: Simplify right side
    21,809x = 229,603,151.75
  5. Step 5: Solve for x
    x = 229,603,151.75/21,809
  6. Step 6: Final answer
    x = 10,527.91

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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.