Home / 21,531.21-29,713.95-12,099.75

Finding the Fourth Proportional to 21,531.21, 29,713.95 and 12,099.75

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Solution

The fourth proportional to 21,531.21, 29,713.95 and 12,099.75 is: 16,698.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.21 : 29,713.95 = 12,099.75 : x
  2. Step 2: Convert to fraction form
    21,531.21/29,713.95 = 12,099.75/x
  3. Step 3: Cross multiply
    21,531.21x = 29,713.95 × 12,099.75
  4. Step 4: Simplify right side
    21,531.21x = 359,531,366.51
  5. Step 5: Solve for x
    x = 359,531,366.51/21,531.21
  6. Step 6: Final answer
    x = 16,698.15

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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.