Home / 21,117.15-31,675.94-8,628.64

Finding the Fourth Proportional to 21,117.15, 31,675.94 and 8,628.64

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Solution

The fourth proportional to 21,117.15, 31,675.94 and 8,628.64 is: 12,943.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.15 : 31,675.94 = 8,628.64 : x
  2. Step 2: Convert to fraction form
    21,117.15/31,675.94 = 8,628.64/x
  3. Step 3: Cross multiply
    21,117.15x = 31,675.94 × 8,628.64
  4. Step 4: Simplify right side
    21,117.15x = 273,320,282.92
  5. Step 5: Solve for x
    x = 273,320,282.92/21,117.15
  6. Step 6: Final answer
    x = 12,943.05

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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.