Home / 21,328.31-29,334.66-18,671.11

Finding the Fourth Proportional to 21,328.31, 29,334.66 and 18,671.11

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Solution

The fourth proportional to 21,328.31, 29,334.66 and 18,671.11 is: 25,679.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.31 : 29,334.66 = 18,671.11 : x
  2. Step 2: Convert to fraction form
    21,328.31/29,334.66 = 18,671.11/x
  3. Step 3: Cross multiply
    21,328.31x = 29,334.66 × 18,671.11
  4. Step 4: Simplify right side
    21,328.31x = 547,710,520.32
  5. Step 5: Solve for x
    x = 547,710,520.32/21,328.31
  6. Step 6: Final answer
    x = 25,679.97

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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.