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Finding the Fourth Proportional to 15,768.42, 23,620.29 and 12,631.42

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Solution

The fourth proportional to 15,768.42, 23,620.29 and 12,631.42 is: 18,921.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,768.42 : 23,620.29 = 12,631.42 : x
  2. Step 2: Convert to fraction form
    15,768.42/23,620.29 = 12,631.42/x
  3. Step 3: Cross multiply
    15,768.42x = 23,620.29 × 12,631.42
  4. Step 4: Simplify right side
    15,768.42x = 298,357,803.51
  5. Step 5: Solve for x
    x = 298,357,803.51/15,768.42
  6. Step 6: Final answer
    x = 18,921.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.