Home / 20,130.95-27,779.83-11,177.75

Finding the Fourth Proportional to 20,130.95, 27,779.83 and 11,177.75

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Solution

The fourth proportional to 20,130.95, 27,779.83 and 11,177.75 is: 15,424.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.95 : 27,779.83 = 11,177.75 : x
  2. Step 2: Convert to fraction form
    20,130.95/27,779.83 = 11,177.75/x
  3. Step 3: Cross multiply
    20,130.95x = 27,779.83 × 11,177.75
  4. Step 4: Simplify right side
    20,130.95x = 310,516,036.29
  5. Step 5: Solve for x
    x = 310,516,036.29/20,130.95
  6. Step 6: Final answer
    x = 15,424.81

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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.