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Finding the Fourth Proportional to 21,875.57, 32,813.81 and 7,836.51

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Solution

The fourth proportional to 21,875.57, 32,813.81 and 7,836.51 is: 11,754.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,875.57 : 32,813.81 = 7,836.51 : x
  2. Step 2: Convert to fraction form
    21,875.57/32,813.81 = 7,836.51/x
  3. Step 3: Cross multiply
    21,875.57x = 32,813.81 × 7,836.51
  4. Step 4: Simplify right side
    21,875.57x = 257,145,605.73
  5. Step 5: Solve for x
    x = 257,145,605.73/21,875.57
  6. Step 6: Final answer
    x = 11,754.92

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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.