Home / 20,903.68-31,354.20-9,812.80

Finding the Fourth Proportional to 20,903.68, 31,354.20 and 9,812.80

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Solution

The fourth proportional to 20,903.68, 31,354.20 and 9,812.80 is: 14,718.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.68 : 31,354.20 = 9,812.80 : x
  2. Step 2: Convert to fraction form
    20,903.68/31,354.20 = 9,812.80/x
  3. Step 3: Cross multiply
    20,903.68x = 31,354.20 × 9,812.80
  4. Step 4: Simplify right side
    20,903.68x = 307,672,493.76
  5. Step 5: Solve for x
    x = 307,672,493.76/20,903.68
  6. Step 6: Final answer
    x = 14,718.58

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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.