Home / 20,784.12-31,172.43-5,989.40

Finding the Fourth Proportional to 20,784.12, 31,172.43 and 5,989.40

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Solution

The fourth proportional to 20,784.12, 31,172.43 and 5,989.40 is: 8,983.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.12 : 31,172.43 = 5,989.40 : x
  2. Step 2: Convert to fraction form
    20,784.12/31,172.43 = 5,989.40/x
  3. Step 3: Cross multiply
    20,784.12x = 31,172.43 × 5,989.40
  4. Step 4: Simplify right side
    20,784.12x = 186,704,152.24
  5. Step 5: Solve for x
    x = 186,704,152.24/20,784.12
  6. Step 6: Final answer
    x = 8,983.02

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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.