Home / 21,258.72-29,336.58-12,306.60

Finding the Fourth Proportional to 21,258.72, 29,336.58 and 12,306.60

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Solution

The fourth proportional to 21,258.72, 29,336.58 and 12,306.60 is: 16,982.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,258.72 : 29,336.58 = 12,306.60 : x
  2. Step 2: Convert to fraction form
    21,258.72/29,336.58 = 12,306.60/x
  3. Step 3: Cross multiply
    21,258.72x = 29,336.58 × 12,306.60
  4. Step 4: Simplify right side
    21,258.72x = 361,033,555.43
  5. Step 5: Solve for x
    x = 361,033,555.43/21,258.72
  6. Step 6: Final answer
    x = 16,982.85

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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.