Home / 21,471.87-29,631.35-11,781.27

Finding the Fourth Proportional to 21,471.87, 29,631.35 and 11,781.27

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Solution

The fourth proportional to 21,471.87, 29,631.35 and 11,781.27 is: 16,258.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,471.87 : 29,631.35 = 11,781.27 : x
  2. Step 2: Convert to fraction form
    21,471.87/29,631.35 = 11,781.27/x
  3. Step 3: Cross multiply
    21,471.87x = 29,631.35 × 11,781.27
  4. Step 4: Simplify right side
    21,471.87x = 349,094,934.81
  5. Step 5: Solve for x
    x = 349,094,934.81/21,471.87
  6. Step 6: Final answer
    x = 16,258.25

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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.