Home / 6,420.60-9,630.90-5,130.27

Finding the Fourth Proportional to 6,420.60, 9,630.90 and 5,130.27

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Solution

The fourth proportional to 6,420.60, 9,630.90 and 5,130.27 is: 7,695.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.60 : 9,630.90 = 5,130.27 : x
  2. Step 2: Convert to fraction form
    6,420.60/9,630.90 = 5,130.27/x
  3. Step 3: Cross multiply
    6,420.60x = 9,630.90 × 5,130.27
  4. Step 4: Simplify right side
    6,420.60x = 49,409,117.34
  5. Step 5: Solve for x
    x = 49,409,117.34/6,420.60
  6. Step 6: Final answer
    x = 7,695.41

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Similar ratio
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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.