Home / 20,989.49-31,464.44-10,449.53

Finding the Fourth Proportional to 20,989.49, 31,464.44 and 10,449.53

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Solution

The fourth proportional to 20,989.49, 31,464.44 and 10,449.53 is: 15,664.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.49 : 31,464.44 = 10,449.53 : x
  2. Step 2: Convert to fraction form
    20,989.49/31,464.44 = 10,449.53/x
  3. Step 3: Cross multiply
    20,989.49x = 31,464.44 × 10,449.53
  4. Step 4: Simplify right side
    20,989.49x = 328,788,609.71
  5. Step 5: Solve for x
    x = 328,788,609.71/20,989.49
  6. Step 6: Final answer
    x = 15,664.44

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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.