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Finding the Fourth Proportional to 9,402.55, 12,975.07 and 5,424.95

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Solution

The fourth proportional to 9,402.55, 12,975.07 and 5,424.95 is: 7,486.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,402.55 : 12,975.07 = 5,424.95 : x
  2. Step 2: Convert to fraction form
    9,402.55/12,975.07 = 5,424.95/x
  3. Step 3: Cross multiply
    9,402.55x = 12,975.07 × 5,424.95
  4. Step 4: Simplify right side
    9,402.55x = 70,389,014.00
  5. Step 5: Solve for x
    x = 70,389,014.00/9,402.55
  6. Step 6: Final answer
    x = 7,486.16

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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.