Home / 21,122.88-29,151-12,170.16

Finding the Fourth Proportional to 21,122.88, 29,151 and 12,170.16

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Solution

The fourth proportional to 21,122.88, 29,151 and 12,170.16 is: 16,795.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122.88 : 29,151 = 12,170.16 : x
  2. Step 2: Convert to fraction form
    21,122.88/29,151 = 12,170.16/x
  3. Step 3: Cross multiply
    21,122.88x = 29,151 × 12,170.16
  4. Step 4: Simplify right side
    21,122.88x = 354,772,334.16
  5. Step 5: Solve for x
    x = 354,772,334.16/21,122.88
  6. Step 6: Final answer
    x = 16,795.64

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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.