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Finding the Fourth Proportional to 9,402.64, 12,975.06 and 5,210.90

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Solution

The fourth proportional to 9,402.64, 12,975.06 and 5,210.90 is: 7,190.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,402.64 : 12,975.06 = 5,210.90 : x
  2. Step 2: Convert to fraction form
    9,402.64/12,975.06 = 5,210.90/x
  3. Step 3: Cross multiply
    9,402.64x = 12,975.06 × 5,210.90
  4. Step 4: Simplify right side
    9,402.64x = 67,611,740.15
  5. Step 5: Solve for x
    x = 67,611,740.15/9,402.64
  6. Step 6: Final answer
    x = 7,190.72

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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.