Home / 20,957.05-31,408.85-9,839.20

Finding the Fourth Proportional to 20,957.05, 31,408.85 and 9,839.20

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Solution

The fourth proportional to 20,957.05, 31,408.85 and 9,839.20 is: 14,746.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,957.05 : 31,408.85 = 9,839.20 : x
  2. Step 2: Convert to fraction form
    20,957.05/31,408.85 = 9,839.20/x
  3. Step 3: Cross multiply
    20,957.05x = 31,408.85 × 9,839.20
  4. Step 4: Simplify right side
    20,957.05x = 309,037,750.68
  5. Step 5: Solve for x
    x = 309,037,750.68/20,957.05
  6. Step 6: Final answer
    x = 14,746.24

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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.