Home / 20,637.24-28,479.70-11,205.80

Finding the Fourth Proportional to 20,637.24, 28,479.70 and 11,205.80

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Solution

The fourth proportional to 20,637.24, 28,479.70 and 11,205.80 is: 15,464.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.24 : 28,479.70 = 11,205.80 : x
  2. Step 2: Convert to fraction form
    20,637.24/28,479.70 = 11,205.80/x
  3. Step 3: Cross multiply
    20,637.24x = 28,479.70 × 11,205.80
  4. Step 4: Simplify right side
    20,637.24x = 319,137,822.26
  5. Step 5: Solve for x
    x = 319,137,822.26/20,637.24
  6. Step 6: Final answer
    x = 15,464.17

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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.