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Finding the Fourth Proportional to 38,987.88, 58,491.56 and 11,285.88

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Solution

The fourth proportional to 38,987.88, 58,491.56 and 11,285.88 is: 16,931.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,987.88 : 58,491.56 = 11,285.88 : x
  2. Step 2: Convert to fraction form
    38,987.88/58,491.56 = 11,285.88/x
  3. Step 3: Cross multiply
    38,987.88x = 58,491.56 × 11,285.88
  4. Step 4: Simplify right side
    38,987.88x = 660,128,378.29
  5. Step 5: Solve for x
    x = 660,128,378.29/38,987.88
  6. Step 6: Final answer
    x = 16,931.63

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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.