Home / 20,889.60-31,316.84-9,790.44

Finding the Fourth Proportional to 20,889.60, 31,316.84 and 9,790.44

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Solution

The fourth proportional to 20,889.60, 31,316.84 and 9,790.44 is: 14,677.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.60 : 31,316.84 = 9,790.44 : x
  2. Step 2: Convert to fraction form
    20,889.60/31,316.84 = 9,790.44/x
  3. Step 3: Cross multiply
    20,889.60x = 31,316.84 × 9,790.44
  4. Step 4: Simplify right side
    20,889.60x = 306,605,643.01
  5. Step 5: Solve for x
    x = 306,605,643.01/20,889.60
  6. Step 6: Final answer
    x = 14,677.43

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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.