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Finding the Third Proportional to 20,220 and 29,428

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Solution

The third proportional to 20,220 and 29,428 is: 42,829.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220 : 29,428 = 29,428 : x
  2. Step 2: Convert to fraction form
    20,220/29,428 = 29,428/x
  3. Step 3: Cross multiply
    20,220x = 29,428 × 29,428
  4. Step 4: Simplify right side
    20,220x = 866,007,184
  5. Step 5: Solve for x
    x = 866,007,184/20,220
  6. Step 6: Final answer
    x = 42,829.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.