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Finding the Fourth Proportional to 28,174.72, 42,303.72 and 15,719.08

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Solution

The fourth proportional to 28,174.72, 42,303.72 and 15,719.08 is: 23,601.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,174.72 : 42,303.72 = 15,719.08 : x
  2. Step 2: Convert to fraction form
    28,174.72/42,303.72 = 15,719.08/x
  3. Step 3: Cross multiply
    28,174.72x = 42,303.72 × 15,719.08
  4. Step 4: Simplify right side
    28,174.72x = 664,975,558.98
  5. Step 5: Solve for x
    x = 664,975,558.98/28,174.72
  6. Step 6: Final answer
    x = 23,601.85

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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.