Home / 20,690.39-28,519.53-13,973.87

Finding the Fourth Proportional to 20,690.39, 28,519.53 and 13,973.87

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Solution

The fourth proportional to 20,690.39, 28,519.53 and 13,973.87 is: 19,261.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,690.39 : 28,519.53 = 13,973.87 : x
  2. Step 2: Convert to fraction form
    20,690.39/28,519.53 = 13,973.87/x
  3. Step 3: Cross multiply
    20,690.39x = 28,519.53 × 13,973.87
  4. Step 4: Simplify right side
    20,690.39x = 398,528,062.08
  5. Step 5: Solve for x
    x = 398,528,062.08/20,690.39
  6. Step 6: Final answer
    x = 19,261.51

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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.