Home / 21,268.28-29,349.78-12,317.40

Finding the Fourth Proportional to 21,268.28, 29,349.78 and 12,317.40

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Solution

The fourth proportional to 21,268.28, 29,349.78 and 12,317.40 is: 16,997.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.28 : 29,349.78 = 12,317.40 : x
  2. Step 2: Convert to fraction form
    21,268.28/29,349.78 = 12,317.40/x
  3. Step 3: Cross multiply
    21,268.28x = 29,349.78 × 12,317.40
  4. Step 4: Simplify right side
    21,268.28x = 361,512,980.17
  5. Step 5: Solve for x
    x = 361,512,980.17/21,268.28
  6. Step 6: Final answer
    x = 16,997.75

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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.