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Finding the Fourth Proportional to 21,859.83, 32,789.66 and 7,068.74

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Solution

The fourth proportional to 21,859.83, 32,789.66 and 7,068.74 is: 10,603.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.83 : 32,789.66 = 7,068.74 : x
  2. Step 2: Convert to fraction form
    21,859.83/32,789.66 = 7,068.74/x
  3. Step 3: Cross multiply
    21,859.83x = 32,789.66 × 7,068.74
  4. Step 4: Simplify right side
    21,859.83x = 231,781,381.94
  5. Step 5: Solve for x
    x = 231,781,381.94/21,859.83
  6. Step 6: Final answer
    x = 10,603.07

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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.