Home / 12,989.55-19,486.05-4,221.51

Finding the Fourth Proportional to 12,989.55, 19,486.05 and 4,221.51

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Solution

The fourth proportional to 12,989.55, 19,486.05 and 4,221.51 is: 6,332.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989.55 : 19,486.05 = 4,221.51 : x
  2. Step 2: Convert to fraction form
    12,989.55/19,486.05 = 4,221.51/x
  3. Step 3: Cross multiply
    12,989.55x = 19,486.05 × 4,221.51
  4. Step 4: Simplify right side
    12,989.55x = 82,260,554.94
  5. Step 5: Solve for x
    x = 82,260,554.94/12,989.55
  6. Step 6: Final answer
    x = 6,332.83

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Double scale
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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.