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Finding the Fourth Proportional to 9,812.10, 14,721.21 and 3,242.90

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Solution

The fourth proportional to 9,812.10, 14,721.21 and 3,242.90 is: 4,865.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,812.10 : 14,721.21 = 3,242.90 : x
  2. Step 2: Convert to fraction form
    9,812.10/14,721.21 = 3,242.90/x
  3. Step 3: Cross multiply
    9,812.10x = 14,721.21 × 3,242.90
  4. Step 4: Simplify right side
    9,812.10x = 47,739,338.30
  5. Step 5: Solve for x
    x = 47,739,338.30/9,812.10
  6. Step 6: Final answer
    x = 4,865.35

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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.