Home / 20,770.20-31,058.10-15,521.40

Finding the Fourth Proportional to 20,770.20, 31,058.10 and 15,521.40

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Solution

The fourth proportional to 20,770.20, 31,058.10 and 15,521.40 is: 23,209.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.20 : 31,058.10 = 15,521.40 : x
  2. Step 2: Convert to fraction form
    20,770.20/31,058.10 = 15,521.40/x
  3. Step 3: Cross multiply
    20,770.20x = 31,058.10 × 15,521.40
  4. Step 4: Simplify right side
    20,770.20x = 482,065,193.34
  5. Step 5: Solve for x
    x = 482,065,193.34/20,770.20
  6. Step 6: Final answer
    x = 23,209.46

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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.