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Finding the Fourth Proportional to 38,673.80, 58,010.70 and 12,379.40

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Solution

The fourth proportional to 38,673.80, 58,010.70 and 12,379.40 is: 18,569.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,673.80 : 58,010.70 = 12,379.40 : x
  2. Step 2: Convert to fraction form
    38,673.80/58,010.70 = 12,379.40/x
  3. Step 3: Cross multiply
    38,673.80x = 58,010.70 × 12,379.40
  4. Step 4: Simplify right side
    38,673.80x = 718,137,659.58
  5. Step 5: Solve for x
    x = 718,137,659.58/38,673.80
  6. Step 6: Final answer
    x = 18,569.10

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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.