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Finding the Fourth Proportional to 8,420.10, 12,630.14 and 4,674.18

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Solution

The fourth proportional to 8,420.10, 12,630.14 and 4,674.18 is: 7,011.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.10 : 12,630.14 = 4,674.18 : x
  2. Step 2: Convert to fraction form
    8,420.10/12,630.14 = 4,674.18/x
  3. Step 3: Cross multiply
    8,420.10x = 12,630.14 × 4,674.18
  4. Step 4: Simplify right side
    8,420.10x = 59,035,544.55
  5. Step 5: Solve for x
    x = 59,035,544.55/8,420.10
  6. Step 6: Final answer
    x = 7,011.27

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Half scale
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Double scale
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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.