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Finding the Fourth Proportional to 7,939.72, 10,956.72 and 4,402.90

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Solution

The fourth proportional to 7,939.72, 10,956.72 and 4,402.90 is: 6,075.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,939.72 : 10,956.72 = 4,402.90 : x
  2. Step 2: Convert to fraction form
    7,939.72/10,956.72 = 4,402.90/x
  3. Step 3: Cross multiply
    7,939.72x = 10,956.72 × 4,402.90
  4. Step 4: Simplify right side
    7,939.72x = 48,241,342.49
  5. Step 5: Solve for x
    x = 48,241,342.49/7,939.72
  6. Step 6: Final answer
    x = 6,075.95

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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.