Home / 6,389.20-9,583.80-4,931.20

Finding the Fourth Proportional to 6,389.20, 9,583.80 and 4,931.20

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Solution

The fourth proportional to 6,389.20, 9,583.80 and 4,931.20 is: 7,396.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,389.20 : 9,583.80 = 4,931.20 : x
  2. Step 2: Convert to fraction form
    6,389.20/9,583.80 = 4,931.20/x
  3. Step 3: Cross multiply
    6,389.20x = 9,583.80 × 4,931.20
  4. Step 4: Simplify right side
    6,389.20x = 47,259,634.56
  5. Step 5: Solve for x
    x = 47,259,634.56/6,389.20
  6. Step 6: Final answer
    x = 7,396.80

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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.