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Finding the Fourth Proportional to 15,008.88, 20,698.43 and 13,816.50

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Solution

The fourth proportional to 15,008.88, 20,698.43 and 13,816.50 is: 19,054.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,008.88 : 20,698.43 = 13,816.50 : x
  2. Step 2: Convert to fraction form
    15,008.88/20,698.43 = 13,816.50/x
  3. Step 3: Cross multiply
    15,008.88x = 20,698.43 × 13,816.50
  4. Step 4: Simplify right side
    15,008.88x = 285,979,789.01
  5. Step 5: Solve for x
    x = 285,979,789.01/15,008.88
  6. Step 6: Final answer
    x = 19,054.04

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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.