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Finding the Fourth Proportional to 15,208.59, 20,987.65 and 8,838.79

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Solution

The fourth proportional to 15,208.59, 20,987.65 and 8,838.79 is: 12,197.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,208.59 : 20,987.65 = 8,838.79 : x
  2. Step 2: Convert to fraction form
    15,208.59/20,987.65 = 8,838.79/x
  3. Step 3: Cross multiply
    15,208.59x = 20,987.65 × 8,838.79
  4. Step 4: Simplify right side
    15,208.59x = 185,505,430.94
  5. Step 5: Solve for x
    x = 185,505,430.94/15,208.59
  6. Step 6: Final answer
    x = 12,197.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.