Home / 31,427.66-47,157.53-20,905.09

Finding the Fourth Proportional to 31,427.66, 47,157.53 and 20,905.09

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Solution

The fourth proportional to 31,427.66, 47,157.53 and 20,905.09 is: 31,368.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,427.66 : 47,157.53 = 20,905.09 : x
  2. Step 2: Convert to fraction form
    31,427.66/47,157.53 = 20,905.09/x
  3. Step 3: Cross multiply
    31,427.66x = 47,157.53 × 20,905.09
  4. Step 4: Simplify right side
    31,427.66x = 985,832,186.41
  5. Step 5: Solve for x
    x = 985,832,186.41/31,427.66
  6. Step 6: Final answer
    x = 31,368.29

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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.