Home / 13,687.47-18,887.70-8,021.88

Finding the Fourth Proportional to 13,687.47, 18,887.70 and 8,021.88

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Solution

The fourth proportional to 13,687.47, 18,887.70 and 8,021.88 is: 11,069.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.47 : 18,887.70 = 8,021.88 : x
  2. Step 2: Convert to fraction form
    13,687.47/18,887.70 = 8,021.88/x
  3. Step 3: Cross multiply
    13,687.47x = 18,887.70 × 8,021.88
  4. Step 4: Simplify right side
    13,687.47x = 151,514,862.88
  5. Step 5: Solve for x
    x = 151,514,862.88/13,687.47
  6. Step 6: Final answer
    x = 11,069.60

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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.