Home / 21,426.17-29,565.32-11,994.75

Finding the Fourth Proportional to 21,426.17, 29,565.32 and 11,994.75

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Solution

The fourth proportional to 21,426.17, 29,565.32 and 11,994.75 is: 16,551.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,426.17 : 29,565.32 = 11,994.75 : x
  2. Step 2: Convert to fraction form
    21,426.17/29,565.32 = 11,994.75/x
  3. Step 3: Cross multiply
    21,426.17x = 29,565.32 × 11,994.75
  4. Step 4: Simplify right side
    21,426.17x = 354,628,562.10
  5. Step 5: Solve for x
    x = 354,628,562.10/21,426.17
  6. Step 6: Final answer
    x = 16,551.19

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Half scale
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Double scale
Find fourth proportional to 21,427.17, 29,566.69 and 11,995.75
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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.