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Finding the Fourth Proportional to 11,405.39, 15,739.76 and 6,369.53

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Solution

The fourth proportional to 11,405.39, 15,739.76 and 6,369.53 is: 8,790.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,405.39 : 15,739.76 = 6,369.53 : x
  2. Step 2: Convert to fraction form
    11,405.39/15,739.76 = 6,369.53/x
  3. Step 3: Cross multiply
    11,405.39x = 15,739.76 × 6,369.53
  4. Step 4: Simplify right side
    11,405.39x = 100,254,810.74
  5. Step 5: Solve for x
    x = 100,254,810.74/11,405.39
  6. Step 6: Final answer
    x = 8,790.13

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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.