Home / 31,728.90-43,783.09-18,301.20

Finding the Fourth Proportional to 31,728.90, 43,783.09 and 18,301.20

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Solution

The fourth proportional to 31,728.90, 43,783.09 and 18,301.20 is: 25,254.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,728.90 : 43,783.09 = 18,301.20 : x
  2. Step 2: Convert to fraction form
    31,728.90/43,783.09 = 18,301.20/x
  3. Step 3: Cross multiply
    31,728.90x = 43,783.09 × 18,301.20
  4. Step 4: Simplify right side
    31,728.90x = 801,283,086.71
  5. Step 5: Solve for x
    x = 801,283,086.71/31,728.90
  6. Step 6: Final answer
    x = 25,254.05

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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.