Home / 21,106.87-31,671.21-9,268.95

Finding the Fourth Proportional to 21,106.87, 31,671.21 and 9,268.95

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Solution

The fourth proportional to 21,106.87, 31,671.21 and 9,268.95 is: 13,908.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,106.87 : 31,671.21 = 9,268.95 : x
  2. Step 2: Convert to fraction form
    21,106.87/31,671.21 = 9,268.95/x
  3. Step 3: Cross multiply
    21,106.87x = 31,671.21 × 9,268.95
  4. Step 4: Simplify right side
    21,106.87x = 293,558,829.16
  5. Step 5: Solve for x
    x = 293,558,829.16/21,106.87
  6. Step 6: Final answer
    x = 13,908.21

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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.