Home / 21,015.05-31,515.68-7,684.98

Finding the Fourth Proportional to 21,015.05, 31,515.68 and 7,684.98

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Solution

The fourth proportional to 21,015.05, 31,515.68 and 7,684.98 is: 11,524.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.05 : 31,515.68 = 7,684.98 : x
  2. Step 2: Convert to fraction form
    21,015.05/31,515.68 = 7,684.98/x
  3. Step 3: Cross multiply
    21,015.05x = 31,515.68 × 7,684.98
  4. Step 4: Simplify right side
    21,015.05x = 242,197,271.52
  5. Step 5: Solve for x
    x = 242,197,271.52/21,015.05
  6. Step 6: Final answer
    x = 11,524.95

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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.