Home / 15,288.52-21,094.94-9,991.12

Finding the Fourth Proportional to 15,288.52, 21,094.94 and 9,991.12

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Solution

The fourth proportional to 15,288.52, 21,094.94 and 9,991.12 is: 13,785.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,288.52 : 21,094.94 = 9,991.12 : x
  2. Step 2: Convert to fraction form
    15,288.52/21,094.94 = 9,991.12/x
  3. Step 3: Cross multiply
    15,288.52x = 21,094.94 × 9,991.12
  4. Step 4: Simplify right side
    15,288.52x = 210,762,076.93
  5. Step 5: Solve for x
    x = 210,762,076.93/15,288.52
  6. Step 6: Final answer
    x = 13,785.64

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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.