Home / 21,009.36-31,512.93-7,860.74

Finding the Fourth Proportional to 21,009.36, 31,512.93 and 7,860.74

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Solution

The fourth proportional to 21,009.36, 31,512.93 and 7,860.74 is: 11,790.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.36 : 31,512.93 = 7,860.74 : x
  2. Step 2: Convert to fraction form
    21,009.36/31,512.93 = 7,860.74/x
  3. Step 3: Cross multiply
    21,009.36x = 31,512.93 × 7,860.74
  4. Step 4: Simplify right side
    21,009.36x = 247,714,791.80
  5. Step 5: Solve for x
    x = 247,714,791.80/21,009.36
  6. Step 6: Final answer
    x = 11,790.69

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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.