Home / 21,131.76-31,667.40-11,878.32

Finding the Fourth Proportional to 21,131.76, 31,667.40 and 11,878.32

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Solution

The fourth proportional to 21,131.76, 31,667.40 and 11,878.32 is: 17,800.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.76 : 31,667.40 = 11,878.32 : x
  2. Step 2: Convert to fraction form
    21,131.76/31,667.40 = 11,878.32/x
  3. Step 3: Cross multiply
    21,131.76x = 31,667.40 × 11,878.32
  4. Step 4: Simplify right side
    21,131.76x = 376,155,510.77
  5. Step 5: Solve for x
    x = 376,155,510.77/21,131.76
  6. Step 6: Final answer
    x = 17,800.48

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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.