Home / 20,983.92-31,445.64-12,098.89

Finding the Fourth Proportional to 20,983.92, 31,445.64 and 12,098.89

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Solution

The fourth proportional to 20,983.92, 31,445.64 and 12,098.89 is: 18,130.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.92 : 31,445.64 = 12,098.89 : x
  2. Step 2: Convert to fraction form
    20,983.92/31,445.64 = 12,098.89/x
  3. Step 3: Cross multiply
    20,983.92x = 31,445.64 × 12,098.89
  4. Step 4: Simplify right side
    20,983.92x = 380,457,501.12
  5. Step 5: Solve for x
    x = 380,457,501.12/20,983.92
  6. Step 6: Final answer
    x = 18,130.90

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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.