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Finding the Fourth Proportional to 7,800.70, 10,761.91 and 4,811.34

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Solution

The fourth proportional to 7,800.70, 10,761.91 and 4,811.34 is: 6,637.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,800.70 : 10,761.91 = 4,811.34 : x
  2. Step 2: Convert to fraction form
    7,800.70/10,761.91 = 4,811.34/x
  3. Step 3: Cross multiply
    7,800.70x = 10,761.91 × 4,811.34
  4. Step 4: Simplify right side
    7,800.70x = 51,779,208.06
  5. Step 5: Solve for x
    x = 51,779,208.06/7,800.70
  6. Step 6: Final answer
    x = 6,637.76

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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.