Home / 20,551.08-28,360.44-11,119.80

Finding the Fourth Proportional to 20,551.08, 28,360.44 and 11,119.80

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Solution

The fourth proportional to 20,551.08, 28,360.44 and 11,119.80 is: 15,345.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,551.08 : 28,360.44 = 11,119.80 : x
  2. Step 2: Convert to fraction form
    20,551.08/28,360.44 = 11,119.80/x
  3. Step 3: Cross multiply
    20,551.08x = 28,360.44 × 11,119.80
  4. Step 4: Simplify right side
    20,551.08x = 315,362,420.71
  5. Step 5: Solve for x
    x = 315,362,420.71/20,551.08
  6. Step 6: Final answer
    x = 15,345.30

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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.