Home / 20,207.79-27,888.23-13,154.72

Finding the Fourth Proportional to 20,207.79, 27,888.23 and 13,154.72

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Solution

The fourth proportional to 20,207.79, 27,888.23 and 13,154.72 is: 18,154.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,207.79 : 27,888.23 = 13,154.72 : x
  2. Step 2: Convert to fraction form
    20,207.79/27,888.23 = 13,154.72/x
  3. Step 3: Cross multiply
    20,207.79x = 27,888.23 × 13,154.72
  4. Step 4: Simplify right side
    20,207.79x = 366,861,750.39
  5. Step 5: Solve for x
    x = 366,861,750.39/20,207.79
  6. Step 6: Final answer
    x = 18,154.47

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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.