Home / 20,318.67-28,042.74-12,359.35

Finding the Fourth Proportional to 20,318.67, 28,042.74 and 12,359.35

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Solution

The fourth proportional to 20,318.67, 28,042.74 and 12,359.35 is: 17,057.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.67 : 28,042.74 = 12,359.35 : x
  2. Step 2: Convert to fraction form
    20,318.67/28,042.74 = 12,359.35/x
  3. Step 3: Cross multiply
    20,318.67x = 28,042.74 × 12,359.35
  4. Step 4: Simplify right side
    20,318.67x = 346,590,038.62
  5. Step 5: Solve for x
    x = 346,590,038.62/20,318.67
  6. Step 6: Final answer
    x = 17,057.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.