Home / 7,014.28-9,678.85-3,870.47

Finding the Fourth Proportional to 7,014.28, 9,678.85 and 3,870.47

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Solution

The fourth proportional to 7,014.28, 9,678.85 and 3,870.47 is: 5,340.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,014.28 : 9,678.85 = 3,870.47 : x
  2. Step 2: Convert to fraction form
    7,014.28/9,678.85 = 3,870.47/x
  3. Step 3: Cross multiply
    7,014.28x = 9,678.85 × 3,870.47
  4. Step 4: Simplify right side
    7,014.28x = 37,461,698.56
  5. Step 5: Solve for x
    x = 37,461,698.56/7,014.28
  6. Step 6: Final answer
    x = 5,340.78

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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.