Home / 21,138.42-29,104.63-17,945.10

Finding the Fourth Proportional to 21,138.42, 29,104.63 and 17,945.10

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Solution

The fourth proportional to 21,138.42, 29,104.63 and 17,945.10 is: 24,707.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,138.42 : 29,104.63 = 17,945.10 : x
  2. Step 2: Convert to fraction form
    21,138.42/29,104.63 = 17,945.10/x
  3. Step 3: Cross multiply
    21,138.42x = 29,104.63 × 17,945.10
  4. Step 4: Simplify right side
    21,138.42x = 522,285,495.81
  5. Step 5: Solve for x
    x = 522,285,495.81/21,138.42
  6. Step 6: Final answer
    x = 24,707.88

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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.