Home / 20,637.78-28,480.14-11,206.35

Finding the Fourth Proportional to 20,637.78, 28,480.14 and 11,206.35

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Solution

The fourth proportional to 20,637.78, 28,480.14 and 11,206.35 is: 15,464.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.78 : 28,480.14 = 11,206.35 : x
  2. Step 2: Convert to fraction form
    20,637.78/28,480.14 = 11,206.35/x
  3. Step 3: Cross multiply
    20,637.78x = 28,480.14 × 11,206.35
  4. Step 4: Simplify right side
    20,637.78x = 319,158,274.49
  5. Step 5: Solve for x
    x = 319,158,274.49/20,637.78
  6. Step 6: Final answer
    x = 15,464.76

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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.