Home / 21,107.20-31,603.20-16,460.80

Finding the Fourth Proportional to 21,107.20, 31,603.20 and 16,460.80

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Solution

The fourth proportional to 21,107.20, 31,603.20 and 16,460.80 is: 24,646.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.20 : 31,603.20 = 16,460.80 : x
  2. Step 2: Convert to fraction form
    21,107.20/31,603.20 = 16,460.80/x
  3. Step 3: Cross multiply
    21,107.20x = 31,603.20 × 16,460.80
  4. Step 4: Simplify right side
    21,107.20x = 520,213,954.56
  5. Step 5: Solve for x
    x = 520,213,954.56/21,107.20
  6. Step 6: Final answer
    x = 24,646.28

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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.