Home / 13,815.90-20,730.60-6,416.55

Finding the Fourth Proportional to 13,815.90, 20,730.60 and 6,416.55

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Solution

The fourth proportional to 13,815.90, 20,730.60 and 6,416.55 is: 9,627.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.90 : 20,730.60 = 6,416.55 : x
  2. Step 2: Convert to fraction form
    13,815.90/20,730.60 = 6,416.55/x
  3. Step 3: Cross multiply
    13,815.90x = 20,730.60 × 6,416.55
  4. Step 4: Simplify right side
    13,815.90x = 133,018,931.43
  5. Step 5: Solve for x
    x = 133,018,931.43/13,815.90
  6. Step 6: Final answer
    x = 9,627.96

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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.