Home / 18,805.23-28,156.82-12,215.07

Finding the Fourth Proportional to 18,805.23, 28,156.82 and 12,215.07

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Solution

The fourth proportional to 18,805.23, 28,156.82 and 12,215.07 is: 18,289.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805.23 : 28,156.82 = 12,215.07 : x
  2. Step 2: Convert to fraction form
    18,805.23/28,156.82 = 12,215.07/x
  3. Step 3: Cross multiply
    18,805.23x = 28,156.82 × 12,215.07
  4. Step 4: Simplify right side
    18,805.23x = 343,937,466.20
  5. Step 5: Solve for x
    x = 343,937,466.20/18,805.23
  6. Step 6: Final answer
    x = 18,289.46

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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.