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Finding the Fourth Proportional to 15,568.91, 21,485.94 and 8,495.38

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Solution

The fourth proportional to 15,568.91, 21,485.94 and 8,495.38 is: 11,724.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,568.91 : 21,485.94 = 8,495.38 : x
  2. Step 2: Convert to fraction form
    15,568.91/21,485.94 = 8,495.38/x
  3. Step 3: Cross multiply
    15,568.91x = 21,485.94 × 8,495.38
  4. Step 4: Simplify right side
    15,568.91x = 182,531,117.53
  5. Step 5: Solve for x
    x = 182,531,117.53/15,568.91
  6. Step 6: Final answer
    x = 11,724.08

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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.