Home / 31,343.90-43,230.40-21,783.60

Finding the Fourth Proportional to 31,343.90, 43,230.40 and 21,783.60

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Solution

The fourth proportional to 31,343.90, 43,230.40 and 21,783.60 is: 30,044.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,343.90 : 43,230.40 = 21,783.60 : x
  2. Step 2: Convert to fraction form
    31,343.90/43,230.40 = 21,783.60/x
  3. Step 3: Cross multiply
    31,343.90x = 43,230.40 × 21,783.60
  4. Step 4: Simplify right side
    31,343.90x = 941,713,741.44
  5. Step 5: Solve for x
    x = 941,713,741.44/31,343.90
  6. Step 6: Final answer
    x = 30,044.56

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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.