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Finding the Fourth Proportional to 9,915.08, 13,681.80 and 5,936.09

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Solution

The fourth proportional to 9,915.08, 13,681.80 and 5,936.09 is: 8,191.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,915.08 : 13,681.80 = 5,936.09 : x
  2. Step 2: Convert to fraction form
    9,915.08/13,681.80 = 5,936.09/x
  3. Step 3: Cross multiply
    9,915.08x = 13,681.80 × 5,936.09
  4. Step 4: Simplify right side
    9,915.08x = 81,216,430.37
  5. Step 5: Solve for x
    x = 81,216,430.37/9,915.08
  6. Step 6: Final answer
    x = 8,191.20

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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.