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Finding the Fourth Proportional to 37,980.72, 56,991.48 and 15,809.40

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Solution

The fourth proportional to 37,980.72, 56,991.48 and 15,809.40 is: 23,722.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    37,980.72 : 56,991.48 = 15,809.40 : x
  2. Step 2: Convert to fraction form
    37,980.72/56,991.48 = 15,809.40/x
  3. Step 3: Cross multiply
    37,980.72x = 56,991.48 × 15,809.40
  4. Step 4: Simplify right side
    37,980.72x = 901,001,103.91
  5. Step 5: Solve for x
    x = 901,001,103.91/37,980.72
  6. Step 6: Final answer
    x = 23,722.59

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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.