Home / 12,987.87-19,484.10-4,221.24

Finding the Fourth Proportional to 12,987.87, 19,484.10 and 4,221.24

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Solution

The fourth proportional to 12,987.87, 19,484.10 and 4,221.24 is: 6,332.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,987.87 : 19,484.10 = 4,221.24 : x
  2. Step 2: Convert to fraction form
    12,987.87/19,484.10 = 4,221.24/x
  3. Step 3: Cross multiply
    12,987.87x = 19,484.10 × 4,221.24
  4. Step 4: Simplify right side
    12,987.87x = 82,247,062.28
  5. Step 5: Solve for x
    x = 82,247,062.28/12,987.87
  6. Step 6: Final answer
    x = 6,332.61

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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.