Home / 20,739.35-31,109.02-5,156.98

Finding the Fourth Proportional to 20,739.35, 31,109.02 and 5,156.98

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Solution

The fourth proportional to 20,739.35, 31,109.02 and 5,156.98 is: 7,735.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.35 : 31,109.02 = 5,156.98 : x
  2. Step 2: Convert to fraction form
    20,739.35/31,109.02 = 5,156.98/x
  3. Step 3: Cross multiply
    20,739.35x = 31,109.02 × 5,156.98
  4. Step 4: Simplify right side
    20,739.35x = 160,428,438.41
  5. Step 5: Solve for x
    x = 160,428,438.41/20,739.35
  6. Step 6: Final answer
    x = 7,735.46

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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.