Home / 20,683.20-31,030.24-8,998.72

Finding the Fourth Proportional to 20,683.20, 31,030.24 and 8,998.72

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Solution

The fourth proportional to 20,683.20, 31,030.24 and 8,998.72 is: 13,500.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,683.20 : 31,030.24 = 8,998.72 : x
  2. Step 2: Convert to fraction form
    20,683.20/31,030.24 = 8,998.72/x
  3. Step 3: Cross multiply
    20,683.20x = 31,030.24 × 8,998.72
  4. Step 4: Simplify right side
    20,683.20x = 279,232,441.29
  5. Step 5: Solve for x
    x = 279,232,441.29/20,683.20
  6. Step 6: Final answer
    x = 13,500.45

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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.