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Finding the Fourth Proportional to 7,881.39, 11,810.16 and 4,757.91

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Solution

The fourth proportional to 7,881.39, 11,810.16 and 4,757.91 is: 7,129.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.39 : 11,810.16 = 4,757.91 : x
  2. Step 2: Convert to fraction form
    7,881.39/11,810.16 = 4,757.91/x
  3. Step 3: Cross multiply
    7,881.39x = 11,810.16 × 4,757.91
  4. Step 4: Simplify right side
    7,881.39x = 56,191,678.37
  5. Step 5: Solve for x
    x = 56,191,678.37/7,881.39
  6. Step 6: Final answer
    x = 7,129.67

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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.