Home / 20,129.48-27,778.77-12,580.19

Finding the Fourth Proportional to 20,129.48, 27,778.77 and 12,580.19

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Solution

The fourth proportional to 20,129.48, 27,778.77 and 12,580.19 is: 17,360.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.48 : 27,778.77 = 12,580.19 : x
  2. Step 2: Convert to fraction form
    20,129.48/27,778.77 = 12,580.19/x
  3. Step 3: Cross multiply
    20,129.48x = 27,778.77 × 12,580.19
  4. Step 4: Simplify right side
    20,129.48x = 349,462,204.57
  5. Step 5: Solve for x
    x = 349,462,204.57/20,129.48
  6. Step 6: Final answer
    x = 17,360.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.