Home / 20,963.79-28,921.47-11,887.23

Finding the Fourth Proportional to 20,963.79, 28,921.47 and 11,887.23

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Solution

The fourth proportional to 20,963.79, 28,921.47 and 11,887.23 is: 16,399.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.79 : 28,921.47 = 11,887.23 : x
  2. Step 2: Convert to fraction form
    20,963.79/28,921.47 = 11,887.23/x
  3. Step 3: Cross multiply
    20,963.79x = 28,921.47 × 11,887.23
  4. Step 4: Simplify right side
    20,963.79x = 343,796,165.83
  5. Step 5: Solve for x
    x = 343,796,165.83/20,963.79
  6. Step 6: Final answer
    x = 16,399.52

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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.