Home / 9,320.80-12,860.40-5,340.64

Finding the Fourth Proportional to 9,320.80, 12,860.40 and 5,340.64

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Solution

The fourth proportional to 9,320.80, 12,860.40 and 5,340.64 is: 7,368.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,320.80 : 12,860.40 = 5,340.64 : x
  2. Step 2: Convert to fraction form
    9,320.80/12,860.40 = 5,340.64/x
  3. Step 3: Cross multiply
    9,320.80x = 12,860.40 × 5,340.64
  4. Step 4: Simplify right side
    9,320.80x = 68,682,766.66
  5. Step 5: Solve for x
    x = 68,682,766.66/9,320.80
  6. Step 6: Final answer
    x = 7,368.76

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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.