Home / 14,140.72-21,210-4,781.52

Finding the Fourth Proportional to 14,140.72, 21,210 and 4,781.52

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Solution

The fourth proportional to 14,140.72, 21,210 and 4,781.52 is: 7,171.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,140.72 : 21,210 = 4,781.52 : x
  2. Step 2: Convert to fraction form
    14,140.72/21,210 = 4,781.52/x
  3. Step 3: Cross multiply
    14,140.72x = 21,210 × 4,781.52
  4. Step 4: Simplify right side
    14,140.72x = 101,416,039.20
  5. Step 5: Solve for x
    x = 101,416,039.20/14,140.72
  6. Step 6: Final answer
    x = 7,171.91

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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.