Home / 31,138.23-42,971.70-17,711.42

Finding the Fourth Proportional to 31,138.23, 42,971.70 and 17,711.42

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Solution

The fourth proportional to 31,138.23, 42,971.70 and 17,711.42 is: 24,442.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,138.23 : 42,971.70 = 17,711.42 : x
  2. Step 2: Convert to fraction form
    31,138.23/42,971.70 = 17,711.42/x
  3. Step 3: Cross multiply
    31,138.23x = 42,971.70 × 17,711.42
  4. Step 4: Simplify right side
    31,138.23x = 761,089,611.96
  5. Step 5: Solve for x
    x = 761,089,611.96/31,138.23
  6. Step 6: Final answer
    x = 24,442.29

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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.