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Finding the Fourth Proportional to 15,927.79, 21,980.91 and 8,758.25

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Solution

The fourth proportional to 15,927.79, 21,980.91 and 8,758.25 is: 12,086.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,927.79 : 21,980.91 = 8,758.25 : x
  2. Step 2: Convert to fraction form
    15,927.79/21,980.91 = 8,758.25/x
  3. Step 3: Cross multiply
    15,927.79x = 21,980.91 × 8,758.25
  4. Step 4: Simplify right side
    15,927.79x = 192,514,380.41
  5. Step 5: Solve for x
    x = 192,514,380.41/15,927.79
  6. Step 6: Final answer
    x = 12,086.70

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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.