Home / 20,638.07-28,480.64-11,206.63

Finding the Fourth Proportional to 20,638.07, 28,480.64 and 11,206.63

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Solution

The fourth proportional to 20,638.07, 28,480.64 and 11,206.63 is: 15,465.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,638.07 : 28,480.64 = 11,206.63 : x
  2. Step 2: Convert to fraction form
    20,638.07/28,480.64 = 11,206.63/x
  3. Step 3: Cross multiply
    20,638.07x = 28,480.64 × 11,206.63
  4. Step 4: Simplify right side
    20,638.07x = 319,171,867.41
  5. Step 5: Solve for x
    x = 319,171,867.41/20,638.07
  6. Step 6: Final answer
    x = 15,465.20

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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.