Home / 21,258.12-29,341.26-12,873

Finding the Fourth Proportional to 21,258.12, 29,341.26 and 12,873

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Solution

The fourth proportional to 21,258.12, 29,341.26 and 12,873 is: 17,767.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,258.12 : 29,341.26 = 12,873 : x
  2. Step 2: Convert to fraction form
    21,258.12/29,341.26 = 12,873/x
  3. Step 3: Cross multiply
    21,258.12x = 29,341.26 × 12,873
  4. Step 4: Simplify right side
    21,258.12x = 377,710,039.98
  5. Step 5: Solve for x
    x = 377,710,039.98/21,258.12
  6. Step 6: Final answer
    x = 17,767.80

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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.