Home / 7,421.80-11,132.58-2,980.59

Finding the Fourth Proportional to 7,421.80, 11,132.58 and 2,980.59

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Solution

The fourth proportional to 7,421.80, 11,132.58 and 2,980.59 is: 4,470.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,421.80 : 11,132.58 = 2,980.59 : x
  2. Step 2: Convert to fraction form
    7,421.80/11,132.58 = 2,980.59/x
  3. Step 3: Cross multiply
    7,421.80x = 11,132.58 × 2,980.59
  4. Step 4: Simplify right side
    7,421.80x = 33,181,641.72
  5. Step 5: Solve for x
    x = 33,181,641.72/7,421.80
  6. Step 6: Final answer
    x = 4,470.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.