Home / 21,913.56-32,837.76-13,138.20

Finding the Fourth Proportional to 21,913.56, 32,837.76 and 13,138.20

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Solution

The fourth proportional to 21,913.56, 32,837.76 and 13,138.20 is: 19,687.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,913.56 : 32,837.76 = 13,138.20 : x
  2. Step 2: Convert to fraction form
    21,913.56/32,837.76 = 13,138.20/x
  3. Step 3: Cross multiply
    21,913.56x = 32,837.76 × 13,138.20
  4. Step 4: Simplify right side
    21,913.56x = 431,429,058.43
  5. Step 5: Solve for x
    x = 431,429,058.43/21,913.56
  6. Step 6: Final answer
    x = 19,687.77

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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.