Home / 21,166.80-29,216.64-12,220.14

Finding the Fourth Proportional to 21,166.80, 29,216.64 and 12,220.14

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Solution

The fourth proportional to 21,166.80, 29,216.64 and 12,220.14 is: 16,867.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,166.80 : 29,216.64 = 12,220.14 : x
  2. Step 2: Convert to fraction form
    21,166.80/29,216.64 = 12,220.14/x
  3. Step 3: Cross multiply
    21,166.80x = 29,216.64 × 12,220.14
  4. Step 4: Simplify right side
    21,166.80x = 357,031,431.13
  5. Step 5: Solve for x
    x = 357,031,431.13/21,166.80
  6. Step 6: Final answer
    x = 16,867.52

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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.