Home / 21,205.32-29,258.70-12,821.64

Finding the Fourth Proportional to 21,205.32, 29,258.70 and 12,821.64

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Solution

The fourth proportional to 21,205.32, 29,258.70 and 12,821.64 is: 17,691.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,205.32 : 29,258.70 = 12,821.64 : x
  2. Step 2: Convert to fraction form
    21,205.32/29,258.70 = 12,821.64/x
  3. Step 3: Cross multiply
    21,205.32x = 29,258.70 × 12,821.64
  4. Step 4: Simplify right side
    21,205.32x = 375,144,518.27
  5. Step 5: Solve for x
    x = 375,144,518.27/21,205.32
  6. Step 6: Final answer
    x = 17,691.06

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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.