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Finding the Fourth Proportional to 6,421, 9,627.18 and 2,956.36

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Solution

The fourth proportional to 6,421, 9,627.18 and 2,956.36 is: 4,432.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,421 : 9,627.18 = 2,956.36 : x
  2. Step 2: Convert to fraction form
    6,421/9,627.18 = 2,956.36/x
  3. Step 3: Cross multiply
    6,421x = 9,627.18 × 2,956.36
  4. Step 4: Simplify right side
    6,421x = 28,461,409.86
  5. Step 5: Solve for x
    x = 28,461,409.86/6,421
  6. Step 6: Final answer
    x = 4,432.55

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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.