Home / 7,112.57-9,815.45-3,926.01

Finding the Fourth Proportional to 7,112.57, 9,815.45 and 3,926.01

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Solution

The fourth proportional to 7,112.57, 9,815.45 and 3,926.01 is: 5,417.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,112.57 : 9,815.45 = 3,926.01 : x
  2. Step 2: Convert to fraction form
    7,112.57/9,815.45 = 3,926.01/x
  3. Step 3: Cross multiply
    7,112.57x = 9,815.45 × 3,926.01
  4. Step 4: Simplify right side
    7,112.57x = 38,535,564.67
  5. Step 5: Solve for x
    x = 38,535,564.67/7,112.57
  6. Step 6: Final answer
    x = 5,417.96

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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.