Home / 13,681.09-20,518.62-3,817.72

Finding the Fourth Proportional to 13,681.09, 20,518.62 and 3,817.72

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Solution

The fourth proportional to 13,681.09, 20,518.62 and 3,817.72 is: 5,725.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,681.09 : 20,518.62 = 3,817.72 : x
  2. Step 2: Convert to fraction form
    13,681.09/20,518.62 = 3,817.72/x
  3. Step 3: Cross multiply
    13,681.09x = 20,518.62 × 3,817.72
  4. Step 4: Simplify right side
    13,681.09x = 78,334,345.95
  5. Step 5: Solve for x
    x = 78,334,345.95/13,681.09
  6. Step 6: Final answer
    x = 5,725.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.