Home / 20,989.64-31,406.70-15,447.08

Finding the Fourth Proportional to 20,989.64, 31,406.70 and 15,447.08

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Solution

The fourth proportional to 20,989.64, 31,406.70 and 15,447.08 is: 23,113.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.64 : 31,406.70 = 15,447.08 : x
  2. Step 2: Convert to fraction form
    20,989.64/31,406.70 = 15,447.08/x
  3. Step 3: Cross multiply
    20,989.64x = 31,406.70 × 15,447.08
  4. Step 4: Simplify right side
    20,989.64x = 485,141,807.44
  5. Step 5: Solve for x
    x = 485,141,807.44/20,989.64
  6. Step 6: Final answer
    x = 23,113.39

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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.