Home / 7,284.40-10,921.20-2,899.60

Finding the Fourth Proportional to 7,284.40, 10,921.20 and 2,899.60

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Solution

The fourth proportional to 7,284.40, 10,921.20 and 2,899.60 is: 4,347.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,284.40 : 10,921.20 = 2,899.60 : x
  2. Step 2: Convert to fraction form
    7,284.40/10,921.20 = 2,899.60/x
  3. Step 3: Cross multiply
    7,284.40x = 10,921.20 × 2,899.60
  4. Step 4: Simplify right side
    7,284.40x = 31,667,111.52
  5. Step 5: Solve for x
    x = 31,667,111.52/7,284.40
  6. Step 6: Final answer
    x = 4,347.25

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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.