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Finding the Fourth Proportional to 11,121, 15,347.04 and 6,405.24

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Solution

The fourth proportional to 11,121, 15,347.04 and 6,405.24 is: 8,839.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121 : 15,347.04 = 6,405.24 : x
  2. Step 2: Convert to fraction form
    11,121/15,347.04 = 6,405.24/x
  3. Step 3: Cross multiply
    11,121x = 15,347.04 × 6,405.24
  4. Step 4: Simplify right side
    11,121x = 98,301,474.49
  5. Step 5: Solve for x
    x = 98,301,474.49/11,121
  6. Step 6: Final answer
    x = 8,839.27

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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.