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Finding the Fourth Proportional to 8,984.32, 12,401.10 and 5,208.40

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Solution

The fourth proportional to 8,984.32, 12,401.10 and 5,208.40 is: 7,189.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,984.32 : 12,401.10 = 5,208.40 : x
  2. Step 2: Convert to fraction form
    8,984.32/12,401.10 = 5,208.40/x
  3. Step 3: Cross multiply
    8,984.32x = 12,401.10 × 5,208.40
  4. Step 4: Simplify right side
    8,984.32x = 64,589,904.74
  5. Step 5: Solve for x
    x = 64,589,904.74/8,984.32
  6. Step 6: Final answer
    x = 7,189.18

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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.