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Finding the Fourth Proportional to 30,951.72, 42,697.26 and 19,017.72

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Solution

The fourth proportional to 30,951.72, 42,697.26 and 19,017.72 is: 26,234.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,951.72 : 42,697.26 = 19,017.72 : x
  2. Step 2: Convert to fraction form
    30,951.72/42,697.26 = 19,017.72/x
  3. Step 3: Cross multiply
    30,951.72x = 42,697.26 × 19,017.72
  4. Step 4: Simplify right side
    30,951.72x = 812,004,535.45
  5. Step 5: Solve for x
    x = 812,004,535.45/30,951.72
  6. Step 6: Final answer
    x = 26,234.55

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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.