Home / 5,019.20-7,528.80-4,990.40

Finding the Fourth Proportional to 5,019.20, 7,528.80 and 4,990.40

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Solution

The fourth proportional to 5,019.20, 7,528.80 and 4,990.40 is: 7,485.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,019.20 : 7,528.80 = 4,990.40 : x
  2. Step 2: Convert to fraction form
    5,019.20/7,528.80 = 4,990.40/x
  3. Step 3: Cross multiply
    5,019.20x = 7,528.80 × 4,990.40
  4. Step 4: Simplify right side
    5,019.20x = 37,571,723.52
  5. Step 5: Solve for x
    x = 37,571,723.52/5,019.20
  6. Step 6: Final answer
    x = 7,485.60

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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.