Home / 7,621.20-11,431.80-5,288.40

Finding the Fourth Proportional to 7,621.20, 11,431.80 and 5,288.40

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Solution

The fourth proportional to 7,621.20, 11,431.80 and 5,288.40 is: 7,932.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,621.20 : 11,431.80 = 5,288.40 : x
  2. Step 2: Convert to fraction form
    7,621.20/11,431.80 = 5,288.40/x
  3. Step 3: Cross multiply
    7,621.20x = 11,431.80 × 5,288.40
  4. Step 4: Simplify right side
    7,621.20x = 60,455,931.12
  5. Step 5: Solve for x
    x = 60,455,931.12/7,621.20
  6. Step 6: Final answer
    x = 7,932.60

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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.