Home / 20,963.88-31,464.36-18,739.08

Finding the Fourth Proportional to 20,963.88, 31,464.36 and 18,739.08

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Solution

The fourth proportional to 20,963.88, 31,464.36 and 18,739.08 is: 28,125.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.88 : 31,464.36 = 18,739.08 : x
  2. Step 2: Convert to fraction form
    20,963.88/31,464.36 = 18,739.08/x
  3. Step 3: Cross multiply
    20,963.88x = 31,464.36 × 18,739.08
  4. Step 4: Simplify right side
    20,963.88x = 589,613,159.19
  5. Step 5: Solve for x
    x = 589,613,159.19/20,963.88
  6. Step 6: Final answer
    x = 28,125.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.