Home / 31,647.84-43,678.15-18,219.66

Finding the Fourth Proportional to 31,647.84, 43,678.15 and 18,219.66

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Solution

The fourth proportional to 31,647.84, 43,678.15 and 18,219.66 is: 25,145.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,647.84 : 43,678.15 = 18,219.66 : x
  2. Step 2: Convert to fraction form
    31,647.84/43,678.15 = 18,219.66/x
  3. Step 3: Cross multiply
    31,647.84x = 43,678.15 × 18,219.66
  4. Step 4: Simplify right side
    31,647.84x = 795,800,981.55
  5. Step 5: Solve for x
    x = 795,800,981.55/31,647.84
  6. Step 6: Final answer
    x = 25,145.51

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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.