Home / 20,677.84-31,021.95-6,639.12

Finding the Fourth Proportional to 20,677.84, 31,021.95 and 6,639.12

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Solution

The fourth proportional to 20,677.84, 31,021.95 and 6,639.12 is: 9,960.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,677.84 : 31,021.95 = 6,639.12 : x
  2. Step 2: Convert to fraction form
    20,677.84/31,021.95 = 6,639.12/x
  3. Step 3: Cross multiply
    20,677.84x = 31,021.95 × 6,639.12
  4. Step 4: Simplify right side
    20,677.84x = 205,958,448.68
  5. Step 5: Solve for x
    x = 205,958,448.68/20,677.84
  6. Step 6: Final answer
    x = 9,960.35

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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.