Home / 7,015.38-9,681.42-3,871.77

Finding the Fourth Proportional to 7,015.38, 9,681.42 and 3,871.77

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Solution

The fourth proportional to 7,015.38, 9,681.42 and 3,871.77 is: 5,343.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,015.38 : 9,681.42 = 3,871.77 : x
  2. Step 2: Convert to fraction form
    7,015.38/9,681.42 = 3,871.77/x
  3. Step 3: Cross multiply
    7,015.38x = 9,681.42 × 3,871.77
  4. Step 4: Simplify right side
    7,015.38x = 37,484,231.51
  5. Step 5: Solve for x
    x = 37,484,231.51/7,015.38
  6. Step 6: Final answer
    x = 5,343.15

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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.