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Finding the Fourth Proportional to 9,348.24, 12,900.64 and 5,156.64

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Solution

The fourth proportional to 9,348.24, 12,900.64 and 5,156.64 is: 7,116.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,348.24 : 12,900.64 = 5,156.64 : x
  2. Step 2: Convert to fraction form
    9,348.24/12,900.64 = 5,156.64/x
  3. Step 3: Cross multiply
    9,348.24x = 12,900.64 × 5,156.64
  4. Step 4: Simplify right side
    9,348.24x = 66,523,956.25
  5. Step 5: Solve for x
    x = 66,523,956.25/9,348.24
  6. Step 6: Final answer
    x = 7,116.20

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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.