Home / 21,690.36-29,933.28-12,258.72

Finding the Fourth Proportional to 21,690.36, 29,933.28 and 12,258.72

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Solution

The fourth proportional to 21,690.36, 29,933.28 and 12,258.72 is: 16,917.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,690.36 : 29,933.28 = 12,258.72 : x
  2. Step 2: Convert to fraction form
    21,690.36/29,933.28 = 12,258.72/x
  3. Step 3: Cross multiply
    21,690.36x = 29,933.28 × 12,258.72
  4. Step 4: Simplify right side
    21,690.36x = 366,943,698.20
  5. Step 5: Solve for x
    x = 366,943,698.20/21,690.36
  6. Step 6: Final answer
    x = 16,917.36

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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.