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Finding the Fourth Proportional to 21,875.82, 32,816.95 and 7,079.82

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Solution

The fourth proportional to 21,875.82, 32,816.95 and 7,079.82 is: 10,620.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,875.82 : 32,816.95 = 7,079.82 : x
  2. Step 2: Convert to fraction form
    21,875.82/32,816.95 = 7,079.82/x
  3. Step 3: Cross multiply
    21,875.82x = 32,816.95 × 7,079.82
  4. Step 4: Simplify right side
    21,875.82x = 232,338,098.95
  5. Step 5: Solve for x
    x = 232,338,098.95/21,875.82
  6. Step 6: Final answer
    x = 10,620.77

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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.