Home / 20,643.96-28,488.16-11,212.48

Finding the Fourth Proportional to 20,643.96, 28,488.16 and 11,212.48

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Solution

The fourth proportional to 20,643.96, 28,488.16 and 11,212.48 is: 15,472.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.96 : 28,488.16 = 11,212.48 : x
  2. Step 2: Convert to fraction form
    20,643.96/28,488.16 = 11,212.48/x
  3. Step 3: Cross multiply
    20,643.96x = 28,488.16 × 11,212.48
  4. Step 4: Simplify right side
    20,643.96x = 319,422,924.24
  5. Step 5: Solve for x
    x = 319,422,924.24/20,643.96
  6. Step 6: Final answer
    x = 15,472.95

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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.