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Finding the Fourth Proportional to 15,808.61, 21,816.32 and 8,735.49

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Solution

The fourth proportional to 15,808.61, 21,816.32 and 8,735.49 is: 12,055.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,808.61 : 21,816.32 = 8,735.49 : x
  2. Step 2: Convert to fraction form
    15,808.61/21,816.32 = 8,735.49/x
  3. Step 3: Cross multiply
    15,808.61x = 21,816.32 × 8,735.49
  4. Step 4: Simplify right side
    15,808.61x = 190,576,201.52
  5. Step 5: Solve for x
    x = 190,576,201.52/15,808.61
  6. Step 6: Final answer
    x = 12,055.22

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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.