Home / 7,770.15-11,595.50-7,725.78

Finding the Fourth Proportional to 7,770.15, 11,595.50 and 7,725.78

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Solution

The fourth proportional to 7,770.15, 11,595.50 and 7,725.78 is: 11,529.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,770.15 : 11,595.50 = 7,725.78 : x
  2. Step 2: Convert to fraction form
    7,770.15/11,595.50 = 7,725.78/x
  3. Step 3: Cross multiply
    7,770.15x = 11,595.50 × 7,725.78
  4. Step 4: Simplify right side
    7,770.15x = 89,584,281.99
  5. Step 5: Solve for x
    x = 89,584,281.99/7,770.15
  6. Step 6: Final answer
    x = 11,529.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.