Home / 7,910.40-10,905.60-6,666.24

Finding the Fourth Proportional to 7,910.40, 10,905.60 and 6,666.24

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Solution

The fourth proportional to 7,910.40, 10,905.60 and 6,666.24 is: 9,190.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,910.40 : 10,905.60 = 6,666.24 : x
  2. Step 2: Convert to fraction form
    7,910.40/10,905.60 = 6,666.24/x
  3. Step 3: Cross multiply
    7,910.40x = 10,905.60 × 6,666.24
  4. Step 4: Simplify right side
    7,910.40x = 72,699,346.94
  5. Step 5: Solve for x
    x = 72,699,346.94/7,910.40
  6. Step 6: Final answer
    x = 9,190.35

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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.