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Finding the Fourth Proportional to 15,866.39, 21,895.58 and 8,792.87

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Solution

The fourth proportional to 15,866.39, 21,895.58 and 8,792.87 is: 12,134.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,866.39 : 21,895.58 = 8,792.87 : x
  2. Step 2: Convert to fraction form
    15,866.39/21,895.58 = 8,792.87/x
  3. Step 3: Cross multiply
    15,866.39x = 21,895.58 × 8,792.87
  4. Step 4: Simplify right side
    15,866.39x = 192,524,901.02
  5. Step 5: Solve for x
    x = 192,524,901.02/15,866.39
  6. Step 6: Final answer
    x = 12,134.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.