Home / 13,158.20-19,730.10-4,388.60

Finding the Fourth Proportional to 13,158.20, 19,730.10 and 4,388.60

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Solution

The fourth proportional to 13,158.20, 19,730.10 and 4,388.60 is: 6,580.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,158.20 : 19,730.10 = 4,388.60 : x
  2. Step 2: Convert to fraction form
    13,158.20/19,730.10 = 4,388.60/x
  3. Step 3: Cross multiply
    13,158.20x = 19,730.10 × 4,388.60
  4. Step 4: Simplify right side
    13,158.20x = 86,587,516.86
  5. Step 5: Solve for x
    x = 86,587,516.86/13,158.20
  6. Step 6: Final answer
    x = 6,580.50

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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.