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Finding the Fourth Proportional to 8,892.16, 12,271.28 and 4,913.20

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Solution

The fourth proportional to 8,892.16, 12,271.28 and 4,913.20 is: 6,780.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,892.16 : 12,271.28 = 4,913.20 : x
  2. Step 2: Convert to fraction form
    8,892.16/12,271.28 = 4,913.20/x
  3. Step 3: Cross multiply
    8,892.16x = 12,271.28 × 4,913.20
  4. Step 4: Simplify right side
    8,892.16x = 60,291,252.90
  5. Step 5: Solve for x
    x = 60,291,252.90/8,892.16
  6. Step 6: Final answer
    x = 6,780.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.