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Finding the Fourth Proportional to 15,850.70, 21,875.06 and 8,777.56

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Solution

The fourth proportional to 15,850.70, 21,875.06 and 8,777.56 is: 12,113.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,850.70 : 21,875.06 = 8,777.56 : x
  2. Step 2: Convert to fraction form
    15,850.70/21,875.06 = 8,777.56/x
  3. Step 3: Cross multiply
    15,850.70x = 21,875.06 × 8,777.56
  4. Step 4: Simplify right side
    15,850.70x = 192,009,651.65
  5. Step 5: Solve for x
    x = 192,009,651.65/15,850.70
  6. Step 6: Final answer
    x = 12,113.64

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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.