Home / 21,005.80-31,515.38-6,214.79

Finding the Fourth Proportional to 21,005.80, 31,515.38 and 6,214.79

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Solution

The fourth proportional to 21,005.80, 31,515.38 and 6,214.79 is: 9,324.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.80 : 31,515.38 = 6,214.79 : x
  2. Step 2: Convert to fraction form
    21,005.80/31,515.38 = 6,214.79/x
  3. Step 3: Cross multiply
    21,005.80x = 31,515.38 × 6,214.79
  4. Step 4: Simplify right side
    21,005.80x = 195,861,468.47
  5. Step 5: Solve for x
    x = 195,861,468.47/21,005.80
  6. Step 6: Final answer
    x = 9,324.16

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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.