Home / 21,157.40-29,196.12-12,204.36

Finding the Fourth Proportional to 21,157.40, 29,196.12 and 12,204.36

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Solution

The fourth proportional to 21,157.40, 29,196.12 and 12,204.36 is: 16,841.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.40 : 29,196.12 = 12,204.36 : x
  2. Step 2: Convert to fraction form
    21,157.40/29,196.12 = 12,204.36/x
  3. Step 3: Cross multiply
    21,157.40x = 29,196.12 × 12,204.36
  4. Step 4: Simplify right side
    21,157.40x = 356,319,959.08
  5. Step 5: Solve for x
    x = 356,319,959.08/21,157.40
  6. Step 6: Final answer
    x = 16,841.39

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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.