Home / 20,206.71-27,902.88-12,665.99

Finding the Fourth Proportional to 20,206.71, 27,902.88 and 12,665.99

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Solution

The fourth proportional to 20,206.71, 27,902.88 and 12,665.99 is: 17,490.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,206.71 : 27,902.88 = 12,665.99 : x
  2. Step 2: Convert to fraction form
    20,206.71/27,902.88 = 12,665.99/x
  3. Step 3: Cross multiply
    20,206.71x = 27,902.88 × 12,665.99
  4. Step 4: Simplify right side
    20,206.71x = 353,417,459.54
  5. Step 5: Solve for x
    x = 353,417,459.54/20,206.71
  6. Step 6: Final answer
    x = 17,490.10

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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.