Home / 20,623.61-30,927.71-8,139.48

Finding the Fourth Proportional to 20,623.61, 30,927.71 and 8,139.48

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Solution

The fourth proportional to 20,623.61, 30,927.71 and 8,139.48 is: 12,206.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,623.61 : 30,927.71 = 8,139.48 : x
  2. Step 2: Convert to fraction form
    20,623.61/30,927.71 = 8,139.48/x
  3. Step 3: Cross multiply
    20,623.61x = 30,927.71 × 8,139.48
  4. Step 4: Simplify right side
    20,623.61x = 251,735,436.29
  5. Step 5: Solve for x
    x = 251,735,436.29/20,623.61
  6. Step 6: Final answer
    x = 12,206.18

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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.