Home / 20,151.60-27,811.80-15,434.16

Finding the Fourth Proportional to 20,151.60, 27,811.80 and 15,434.16

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Solution

The fourth proportional to 20,151.60, 27,811.80 and 15,434.16 is: 21,301.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,151.60 : 27,811.80 = 15,434.16 : x
  2. Step 2: Convert to fraction form
    20,151.60/27,811.80 = 15,434.16/x
  3. Step 3: Cross multiply
    20,151.60x = 27,811.80 × 15,434.16
  4. Step 4: Simplify right side
    20,151.60x = 429,251,771.09
  5. Step 5: Solve for x
    x = 429,251,771.09/20,151.60
  6. Step 6: Final answer
    x = 21,301.13

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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.