Home / 20,954.20-31,430.40-7,103.20

Finding the Fourth Proportional to 20,954.20, 31,430.40 and 7,103.20

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Solution

The fourth proportional to 20,954.20, 31,430.40 and 7,103.20 is: 10,654.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954.20 : 31,430.40 = 7,103.20 : x
  2. Step 2: Convert to fraction form
    20,954.20/31,430.40 = 7,103.20/x
  3. Step 3: Cross multiply
    20,954.20x = 31,430.40 × 7,103.20
  4. Step 4: Simplify right side
    20,954.20x = 223,256,417.28
  5. Step 5: Solve for x
    x = 223,256,417.28/20,954.20
  6. Step 6: Final answer
    x = 10,654.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.