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Finding the Fourth Proportional to 15,571.91, 21,490.08 and 8,498.38

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Solution

The fourth proportional to 15,571.91, 21,490.08 and 8,498.38 is: 11,728.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,571.91 : 21,490.08 = 8,498.38 : x
  2. Step 2: Convert to fraction form
    15,571.91/21,490.08 = 8,498.38/x
  3. Step 3: Cross multiply
    15,571.91x = 21,490.08 × 8,498.38
  4. Step 4: Simplify right side
    15,571.91x = 182,630,866.07
  5. Step 5: Solve for x
    x = 182,630,866.07/15,571.91
  6. Step 6: Final answer
    x = 11,728.23

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Double scale
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Similar ratio
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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.