Home / 13,913.60-20,865.21-5,590.80

Finding the Fourth Proportional to 13,913.60, 20,865.21 and 5,590.80

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Solution

The fourth proportional to 13,913.60, 20,865.21 and 5,590.80 is: 8,384.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,913.60 : 20,865.21 = 5,590.80 : x
  2. Step 2: Convert to fraction form
    13,913.60/20,865.21 = 5,590.80/x
  3. Step 3: Cross multiply
    13,913.60x = 20,865.21 × 5,590.80
  4. Step 4: Simplify right side
    13,913.60x = 116,653,144.28
  5. Step 5: Solve for x
    x = 116,653,144.28/13,913.60
  6. Step 6: Final answer
    x = 8,384.11

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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.