Home / 28,375.66-39,140.67-20,405.26

Finding the Fourth Proportional to 28,375.66, 39,140.67 and 20,405.26

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Solution

The fourth proportional to 28,375.66, 39,140.67 and 20,405.26 is: 28,146.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,375.66 : 39,140.67 = 20,405.26 : x
  2. Step 2: Convert to fraction form
    28,375.66/39,140.67 = 20,405.26/x
  3. Step 3: Cross multiply
    28,375.66x = 39,140.67 × 20,405.26
  4. Step 4: Simplify right side
    28,375.66x = 798,675,547.92
  5. Step 5: Solve for x
    x = 798,675,547.92/28,375.66
  6. Step 6: Final answer
    x = 28,146.50

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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.