Home / 20,920.04-31,380.08-13,134.32

Finding the Fourth Proportional to 20,920.04, 31,380.08 and 13,134.32

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Solution

The fourth proportional to 20,920.04, 31,380.08 and 13,134.32 is: 19,701.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,920.04 : 31,380.08 = 13,134.32 : x
  2. Step 2: Convert to fraction form
    20,920.04/31,380.08 = 13,134.32/x
  3. Step 3: Cross multiply
    20,920.04x = 31,380.08 × 13,134.32
  4. Step 4: Simplify right side
    20,920.04x = 412,156,025.12
  5. Step 5: Solve for x
    x = 412,156,025.12/20,920.04
  6. Step 6: Final answer
    x = 19,701.49

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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.