Home / 7,111.31-10,666.96-1,917.18

Finding the Fourth Proportional to 7,111.31, 10,666.96 and 1,917.18

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Solution

The fourth proportional to 7,111.31, 10,666.96 and 1,917.18 is: 2,875.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.31 : 10,666.96 = 1,917.18 : x
  2. Step 2: Convert to fraction form
    7,111.31/10,666.96 = 1,917.18/x
  3. Step 3: Cross multiply
    7,111.31x = 10,666.96 × 1,917.18
  4. Step 4: Simplify right side
    7,111.31x = 20,450,539.47
  5. Step 5: Solve for x
    x = 20,450,539.47/7,111.31
  6. Step 6: Final answer
    x = 2,875.78

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Similar ratio
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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.