Home / 15,389.20-21,237.11-8,315.62

Finding the Fourth Proportional to 15,389.20, 21,237.11 and 8,315.62

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Solution

The fourth proportional to 15,389.20, 21,237.11 and 8,315.62 is: 11,475.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,389.20 : 21,237.11 = 8,315.62 : x
  2. Step 2: Convert to fraction form
    15,389.20/21,237.11 = 8,315.62/x
  3. Step 3: Cross multiply
    15,389.20x = 21,237.11 × 8,315.62
  4. Step 4: Simplify right side
    15,389.20x = 176,599,736.66
  5. Step 5: Solve for x
    x = 176,599,736.66/15,389.20
  6. Step 6: Final answer
    x = 11,475.56

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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.