Home / 20,743.23-28,627.86-12,681.61

Finding the Fourth Proportional to 20,743.23, 28,627.86 and 12,681.61

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Solution

The fourth proportional to 20,743.23, 28,627.86 and 12,681.61 is: 17,501.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.23 : 28,627.86 = 12,681.61 : x
  2. Step 2: Convert to fraction form
    20,743.23/28,627.86 = 12,681.61/x
  3. Step 3: Cross multiply
    20,743.23x = 28,627.86 × 12,681.61
  4. Step 4: Simplify right side
    20,743.23x = 363,047,355.65
  5. Step 5: Solve for x
    x = 363,047,355.65/20,743.23
  6. Step 6: Final answer
    x = 17,501.97

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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.