Home / 21,109.17-29,127.38-12,157.05

Finding the Fourth Proportional to 21,109.17, 29,127.38 and 12,157.05

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Solution

The fourth proportional to 21,109.17, 29,127.38 and 12,157.05 is: 16,774.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,109.17 : 29,127.38 = 12,157.05 : x
  2. Step 2: Convert to fraction form
    21,109.17/29,127.38 = 12,157.05/x
  3. Step 3: Cross multiply
    21,109.17x = 29,127.38 × 12,157.05
  4. Step 4: Simplify right side
    21,109.17x = 354,102,954.24
  5. Step 5: Solve for x
    x = 354,102,954.24/21,109.17
  6. Step 6: Final answer
    x = 16,774.84

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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.