Home / 15,315.67-21,135.09-9,357.31

Finding the Fourth Proportional to 15,315.67, 21,135.09 and 9,357.31

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Solution

The fourth proportional to 15,315.67, 21,135.09 and 9,357.31 is: 12,912.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,315.67 : 21,135.09 = 9,357.31 : x
  2. Step 2: Convert to fraction form
    15,315.67/21,135.09 = 9,357.31/x
  3. Step 3: Cross multiply
    15,315.67x = 21,135.09 × 9,357.31
  4. Step 4: Simplify right side
    15,315.67x = 197,767,589.01
  5. Step 5: Solve for x
    x = 197,767,589.01/15,315.67
  6. Step 6: Final answer
    x = 12,912.76

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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.