Home / 4,931.30-7,398-1,421.28

Finding the Fourth Proportional to 4,931.30, 7,398 and 1,421.28

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Solution

The fourth proportional to 4,931.30, 7,398 and 1,421.28 is: 2,132.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,931.30 : 7,398 = 1,421.28 : x
  2. Step 2: Convert to fraction form
    4,931.30/7,398 = 1,421.28/x
  3. Step 3: Cross multiply
    4,931.30x = 7,398 × 1,421.28
  4. Step 4: Simplify right side
    4,931.30x = 10,514,629.44
  5. Step 5: Solve for x
    x = 10,514,629.44/4,931.30
  6. Step 6: Final answer
    x = 2,132.22

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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.