Home / 20,557.09-28,368.85-11,125.65

Finding the Fourth Proportional to 20,557.09, 28,368.85 and 11,125.65

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Solution

The fourth proportional to 20,557.09, 28,368.85 and 11,125.65 is: 15,353.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.09 : 28,368.85 = 11,125.65 : x
  2. Step 2: Convert to fraction form
    20,557.09/28,368.85 = 11,125.65/x
  3. Step 3: Cross multiply
    20,557.09x = 28,368.85 × 11,125.65
  4. Step 4: Simplify right side
    20,557.09x = 315,621,896.00
  5. Step 5: Solve for x
    x = 315,621,896.00/20,557.09
  6. Step 6: Final answer
    x = 15,353.43

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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.