Home / 21,416.88-29,555.92-11,985.20

Finding the Fourth Proportional to 21,416.88, 29,555.92 and 11,985.20

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Solution

The fourth proportional to 21,416.88, 29,555.92 and 11,985.20 is: 16,539.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,416.88 : 29,555.92 = 11,985.20 : x
  2. Step 2: Convert to fraction form
    21,416.88/29,555.92 = 11,985.20/x
  3. Step 3: Cross multiply
    21,416.88x = 29,555.92 × 11,985.20
  4. Step 4: Simplify right side
    21,416.88x = 354,233,612.38
  5. Step 5: Solve for x
    x = 354,233,612.38/21,416.88
  6. Step 6: Final answer
    x = 16,539.93

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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.