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Finding the Fourth Proportional to 13,315.91, 18,375.91 and 7,347.53

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Solution

The fourth proportional to 13,315.91, 18,375.91 and 7,347.53 is: 10,139.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,315.91 : 18,375.91 = 7,347.53 : x
  2. Step 2: Convert to fraction form
    13,315.91/18,375.91 = 7,347.53/x
  3. Step 3: Cross multiply
    13,315.91x = 18,375.91 × 7,347.53
  4. Step 4: Simplify right side
    13,315.91x = 135,017,550.00
  5. Step 5: Solve for x
    x = 135,017,550.00/13,315.91
  6. Step 6: Final answer
    x = 10,139.57

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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.