Home / 21,228.22-29,286.39-12,830.14

Finding the Fourth Proportional to 21,228.22, 29,286.39 and 12,830.14

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Solution

The fourth proportional to 21,228.22, 29,286.39 and 12,830.14 is: 17,700.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.22 : 29,286.39 = 12,830.14 : x
  2. Step 2: Convert to fraction form
    21,228.22/29,286.39 = 12,830.14/x
  3. Step 3: Cross multiply
    21,228.22x = 29,286.39 × 12,830.14
  4. Step 4: Simplify right side
    21,228.22x = 375,748,483.79
  5. Step 5: Solve for x
    x = 375,748,483.79/21,228.22
  6. Step 6: Final answer
    x = 17,700.42

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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.