Home / 21,436.64-29,581.20-12,005.12

Finding the Fourth Proportional to 21,436.64, 29,581.20 and 12,005.12

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Solution

The fourth proportional to 21,436.64, 29,581.20 and 12,005.12 is: 16,566.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,436.64 : 29,581.20 = 12,005.12 : x
  2. Step 2: Convert to fraction form
    21,436.64/29,581.20 = 12,005.12/x
  3. Step 3: Cross multiply
    21,436.64x = 29,581.20 × 12,005.12
  4. Step 4: Simplify right side
    21,436.64x = 355,125,855.74
  5. Step 5: Solve for x
    x = 355,125,855.74/21,436.64
  6. Step 6: Final answer
    x = 16,566.30

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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.