Home / 4,931.20-7,395.72-1,421.20

Finding the Fourth Proportional to 4,931.20, 7,395.72 and 1,421.20

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Solution

The fourth proportional to 4,931.20, 7,395.72 and 1,421.20 is: 2,131.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,931.20 : 7,395.72 = 1,421.20 : x
  2. Step 2: Convert to fraction form
    4,931.20/7,395.72 = 1,421.20/x
  3. Step 3: Cross multiply
    4,931.20x = 7,395.72 × 1,421.20
  4. Step 4: Simplify right side
    4,931.20x = 10,510,797.26
  5. Step 5: Solve for x
    x = 10,510,797.26/4,931.20
  6. Step 6: Final answer
    x = 2,131.49

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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.