Home / 20,415.36-28,152.72-19,305.12

Finding the Fourth Proportional to 20,415.36, 28,152.72 and 19,305.12

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Solution

The fourth proportional to 20,415.36, 28,152.72 and 19,305.12 is: 26,621.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.36 : 28,152.72 = 19,305.12 : x
  2. Step 2: Convert to fraction form
    20,415.36/28,152.72 = 19,305.12/x
  3. Step 3: Cross multiply
    20,415.36x = 28,152.72 × 19,305.12
  4. Step 4: Simplify right side
    20,415.36x = 543,491,637.93
  5. Step 5: Solve for x
    x = 543,491,637.93/20,415.36
  6. Step 6: Final answer
    x = 26,621.70

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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.