Home / 4,979.18-6,870.74-2,989.28

Finding the Fourth Proportional to 4,979.18, 6,870.74 and 2,989.28

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Solution

The fourth proportional to 4,979.18, 6,870.74 and 2,989.28 is: 4,124.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.18 : 6,870.74 = 2,989.28 : x
  2. Step 2: Convert to fraction form
    4,979.18/6,870.74 = 2,989.28/x
  3. Step 3: Cross multiply
    4,979.18x = 6,870.74 × 2,989.28
  4. Step 4: Simplify right side
    4,979.18x = 20,538,565.67
  5. Step 5: Solve for x
    x = 20,538,565.67/4,979.18
  6. Step 6: Final answer
    x = 4,124.89

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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.