Home / 7,980.78-11,014.01-5,287.35

Finding the Fourth Proportional to 7,980.78, 11,014.01 and 5,287.35

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Solution

The fourth proportional to 7,980.78, 11,014.01 and 5,287.35 is: 7,296.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.78 : 11,014.01 = 5,287.35 : x
  2. Step 2: Convert to fraction form
    7,980.78/11,014.01 = 5,287.35/x
  3. Step 3: Cross multiply
    7,980.78x = 11,014.01 × 5,287.35
  4. Step 4: Simplify right side
    7,980.78x = 58,234,870.70
  5. Step 5: Solve for x
    x = 58,234,870.70/7,980.78
  6. Step 6: Final answer
    x = 7,296.89

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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.