Home / 21,267.78-31,901.67-5,685

Finding the Fourth Proportional to 21,267.78, 31,901.67 and 5,685

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Solution

The fourth proportional to 21,267.78, 31,901.67 and 5,685 is: 8,527.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,267.78 : 31,901.67 = 5,685 : x
  2. Step 2: Convert to fraction form
    21,267.78/31,901.67 = 5,685/x
  3. Step 3: Cross multiply
    21,267.78x = 31,901.67 × 5,685
  4. Step 4: Simplify right side
    21,267.78x = 181,360,993.95
  5. Step 5: Solve for x
    x = 181,360,993.95/21,267.78
  6. Step 6: Final answer
    x = 8,527.50

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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.