Home / 19,875.60-27,430.52-11,919.78

Finding the Fourth Proportional to 19,875.60, 27,430.52 and 11,919.78

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Solution

The fourth proportional to 19,875.60, 27,430.52 and 11,919.78 is: 16,450.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,875.60 : 27,430.52 = 11,919.78 : x
  2. Step 2: Convert to fraction form
    19,875.60/27,430.52 = 11,919.78/x
  3. Step 3: Cross multiply
    19,875.60x = 27,430.52 × 11,919.78
  4. Step 4: Simplify right side
    19,875.60x = 326,965,704.09
  5. Step 5: Solve for x
    x = 326,965,704.09/19,875.60
  6. Step 6: Final answer
    x = 16,450.61

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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.