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Finding the Fourth Proportional to 38,007.80, 57,011.70 and 11,720.60

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Solution

The fourth proportional to 38,007.80, 57,011.70 and 11,720.60 is: 17,580.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,007.80 : 57,011.70 = 11,720.60 : x
  2. Step 2: Convert to fraction form
    38,007.80/57,011.70 = 11,720.60/x
  3. Step 3: Cross multiply
    38,007.80x = 57,011.70 × 11,720.60
  4. Step 4: Simplify right side
    38,007.80x = 668,211,331.02
  5. Step 5: Solve for x
    x = 668,211,331.02/38,007.80
  6. Step 6: Final answer
    x = 17,580.90

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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.