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Finding the Fourth Proportional to 15,679.60, 21,637.83 and 8,606.08

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Solution

The fourth proportional to 15,679.60, 21,637.83 and 8,606.08 is: 11,876.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,679.60 : 21,637.83 = 8,606.08 : x
  2. Step 2: Convert to fraction form
    15,679.60/21,637.83 = 8,606.08/x
  3. Step 3: Cross multiply
    15,679.60x = 21,637.83 × 8,606.08
  4. Step 4: Simplify right side
    15,679.60x = 186,216,896.01
  5. Step 5: Solve for x
    x = 186,216,896.01/15,679.60
  6. Step 6: Final answer
    x = 11,876.38

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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.