Home / 20,637.28-28,479.35-11,205.84

Finding the Fourth Proportional to 20,637.28, 28,479.35 and 11,205.84

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Solution

The fourth proportional to 20,637.28, 28,479.35 and 11,205.84 is: 15,464.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.28 : 28,479.35 = 11,205.84 : x
  2. Step 2: Convert to fraction form
    20,637.28/28,479.35 = 11,205.84/x
  3. Step 3: Cross multiply
    20,637.28x = 28,479.35 × 11,205.84
  4. Step 4: Simplify right side
    20,637.28x = 319,135,111.18
  5. Step 5: Solve for x
    x = 319,135,111.18/20,637.28
  6. Step 6: Final answer
    x = 15,464.01

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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.