Home / 13,678.93-20,520.59-5,781.52

Finding the Fourth Proportional to 13,678.93, 20,520.59 and 5,781.52

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Solution

The fourth proportional to 13,678.93, 20,520.59 and 5,781.52 is: 8,673.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.93 : 20,520.59 = 5,781.52 : x
  2. Step 2: Convert to fraction form
    13,678.93/20,520.59 = 5,781.52/x
  3. Step 3: Cross multiply
    13,678.93x = 20,520.59 × 5,781.52
  4. Step 4: Simplify right side
    13,678.93x = 118,640,172.59
  5. Step 5: Solve for x
    x = 118,640,172.59/13,678.93
  6. Step 6: Final answer
    x = 8,673.21

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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.