Home / 20,678.22-31,014.50-8,989.92

Finding the Fourth Proportional to 20,678.22, 31,014.50 and 8,989.92

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Solution

The fourth proportional to 20,678.22, 31,014.50 and 8,989.92 is: 13,483.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.22 : 31,014.50 = 8,989.92 : x
  2. Step 2: Convert to fraction form
    20,678.22/31,014.50 = 8,989.92/x
  3. Step 3: Cross multiply
    20,678.22x = 31,014.50 × 8,989.92
  4. Step 4: Simplify right side
    20,678.22x = 278,817,828.89
  5. Step 5: Solve for x
    x = 278,817,828.89/20,678.22
  6. Step 6: Final answer
    x = 13,483.65

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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.