Home / 21,712.48-29,964.60-12,153.20

Finding the Fourth Proportional to 21,712.48, 29,964.60 and 12,153.20

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Solution

The fourth proportional to 21,712.48, 29,964.60 and 12,153.20 is: 16,772.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,712.48 : 29,964.60 = 12,153.20 : x
  2. Step 2: Convert to fraction form
    21,712.48/29,964.60 = 12,153.20/x
  3. Step 3: Cross multiply
    21,712.48x = 29,964.60 × 12,153.20
  4. Step 4: Simplify right side
    21,712.48x = 364,165,776.72
  5. Step 5: Solve for x
    x = 364,165,776.72/21,712.48
  6. Step 6: Final answer
    x = 16,772.19

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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.