Home / 21,258.82-29,332.72-12,305.78

Finding the Fourth Proportional to 21,258.82, 29,332.72 and 12,305.78

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Solution

The fourth proportional to 21,258.82, 29,332.72 and 12,305.78 is: 16,979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,258.82 : 29,332.72 = 12,305.78 : x
  2. Step 2: Convert to fraction form
    21,258.82/29,332.72 = 12,305.78/x
  3. Step 3: Cross multiply
    21,258.82x = 29,332.72 × 12,305.78
  4. Step 4: Simplify right side
    21,258.82x = 360,961,999.12
  5. Step 5: Solve for x
    x = 360,961,999.12/21,258.82
  6. Step 6: Final answer
    x = 16,979.40

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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.