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Finding the Fourth Proportional to 20,673.80, 31,010.70 and 19,723.40

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Solution

The fourth proportional to 20,673.80, 31,010.70 and 19,723.40 is: 29,585.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,673.80 : 31,010.70 = 19,723.40 : x
  2. Step 2: Convert to fraction form
    20,673.80/31,010.70 = 19,723.40/x
  3. Step 3: Cross multiply
    20,673.80x = 31,010.70 × 19,723.40
  4. Step 4: Simplify right side
    20,673.80x = 611,636,440.38
  5. Step 5: Solve for x
    x = 611,636,440.38/20,673.80
  6. Step 6: Final answer
    x = 29,585.10

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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.