Home / 20,207.79-27,886.68-11,255.40

Finding the Fourth Proportional to 20,207.79, 27,886.68 and 11,255.40

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Solution

The fourth proportional to 20,207.79, 27,886.68 and 11,255.40 is: 15,532.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,207.79 : 27,886.68 = 11,255.40 : x
  2. Step 2: Convert to fraction form
    20,207.79/27,886.68 = 11,255.40/x
  3. Step 3: Cross multiply
    20,207.79x = 27,886.68 × 11,255.40
  4. Step 4: Simplify right side
    20,207.79x = 313,875,738.07
  5. Step 5: Solve for x
    x = 313,875,738.07/20,207.79
  6. Step 6: Final answer
    x = 15,532.41

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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.