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Finding the Fourth Proportional to 11,315.16, 15,610.86 and 6,347.16

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Solution

The fourth proportional to 11,315.16, 15,610.86 and 6,347.16 is: 8,756.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,315.16 : 15,610.86 = 6,347.16 : x
  2. Step 2: Convert to fraction form
    11,315.16/15,610.86 = 6,347.16/x
  3. Step 3: Cross multiply
    11,315.16x = 15,610.86 × 6,347.16
  4. Step 4: Simplify right side
    11,315.16x = 99,084,626.16
  5. Step 5: Solve for x
    x = 99,084,626.16/11,315.16
  6. Step 6: Final answer
    x = 8,756.80

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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.