Home / 31,670.51-43,686.26-20,915.48

Finding the Fourth Proportional to 31,670.51, 43,686.26 and 20,915.48

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Solution

The fourth proportional to 31,670.51, 43,686.26 and 20,915.48 is: 28,850.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,670.51 : 43,686.26 = 20,915.48 : x
  2. Step 2: Convert to fraction form
    31,670.51/43,686.26 = 20,915.48/x
  3. Step 3: Cross multiply
    31,670.51x = 43,686.26 × 20,915.48
  4. Step 4: Simplify right side
    31,670.51x = 913,719,097.30
  5. Step 5: Solve for x
    x = 913,719,097.30/31,670.51
  6. Step 6: Final answer
    x = 28,850.79

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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.