Home / 28,405.44-39,196.86-15,656.40

Finding the Fourth Proportional to 28,405.44, 39,196.86 and 15,656.40

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Solution

The fourth proportional to 28,405.44, 39,196.86 and 15,656.40 is: 21,604.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,405.44 : 39,196.86 = 15,656.40 : x
  2. Step 2: Convert to fraction form
    28,405.44/39,196.86 = 15,656.40/x
  3. Step 3: Cross multiply
    28,405.44x = 39,196.86 × 15,656.40
  4. Step 4: Simplify right side
    28,405.44x = 613,681,718.90
  5. Step 5: Solve for x
    x = 613,681,718.90/28,405.44
  6. Step 6: Final answer
    x = 21,604.37

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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.