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Finding the Fourth Proportional to 9,313.40, 13,953.68 and 4,921.20

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Solution

The fourth proportional to 9,313.40, 13,953.68 and 4,921.20 is: 7,373.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,313.40 : 13,953.68 = 4,921.20 : x
  2. Step 2: Convert to fraction form
    9,313.40/13,953.68 = 4,921.20/x
  3. Step 3: Cross multiply
    9,313.40x = 13,953.68 × 4,921.20
  4. Step 4: Simplify right side
    9,313.40x = 68,668,850.02
  5. Step 5: Solve for x
    x = 68,668,850.02/9,313.40
  6. Step 6: Final answer
    x = 7,373.12

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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.