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Finding the Fourth Proportional to 20,658.80, 31,007.40 and 17,740.40

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Solution

The fourth proportional to 20,658.80, 31,007.40 and 17,740.40 is: 26,627.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.80 : 31,007.40 = 17,740.40 : x
  2. Step 2: Convert to fraction form
    20,658.80/31,007.40 = 17,740.40/x
  3. Step 3: Cross multiply
    20,658.80x = 31,007.40 × 17,740.40
  4. Step 4: Simplify right side
    20,658.80x = 550,083,678.96
  5. Step 5: Solve for x
    x = 550,083,678.96/20,658.80
  6. Step 6: Final answer
    x = 26,627.09

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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.