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Finding the Fourth Proportional to 8,420.64, 12,605.04 and 5,492.64

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Solution

The fourth proportional to 8,420.64, 12,605.04 and 5,492.64 is: 8,222.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,420.64 : 12,605.04 = 5,492.64 : x
  2. Step 2: Convert to fraction form
    8,420.64/12,605.04 = 5,492.64/x
  3. Step 3: Cross multiply
    8,420.64x = 12,605.04 × 5,492.64
  4. Step 4: Simplify right side
    8,420.64x = 69,234,946.91
  5. Step 5: Solve for x
    x = 69,234,946.91/8,420.64
  6. Step 6: Final answer
    x = 8,222.05

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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.