Home / 34,561.76-47,678.16-21,990.56

Finding the Fourth Proportional to 34,561.76, 47,678.16 and 21,990.56

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Solution

The fourth proportional to 34,561.76, 47,678.16 and 21,990.56 is: 30,336.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,561.76 : 47,678.16 = 21,990.56 : x
  2. Step 2: Convert to fraction form
    34,561.76/47,678.16 = 21,990.56/x
  3. Step 3: Cross multiply
    34,561.76x = 47,678.16 × 21,990.56
  4. Step 4: Simplify right side
    34,561.76x = 1,048,469,438.17
  5. Step 5: Solve for x
    x = 1,048,469,438.17/34,561.76
  6. Step 6: Final answer
    x = 30,336.11

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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.