Home / 7,111.60-10,666.66-1,917.16

Finding the Fourth Proportional to 7,111.60, 10,666.66 and 1,917.16

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Solution

The fourth proportional to 7,111.60, 10,666.66 and 1,917.16 is: 2,875.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.60 : 10,666.66 = 1,917.16 : x
  2. Step 2: Convert to fraction form
    7,111.60/10,666.66 = 1,917.16/x
  3. Step 3: Cross multiply
    7,111.60x = 10,666.66 × 1,917.16
  4. Step 4: Simplify right side
    7,111.60x = 20,449,693.89
  5. Step 5: Solve for x
    x = 20,449,693.89/7,111.60
  6. Step 6: Final answer
    x = 2,875.54

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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.