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Finding the Fourth Proportional to 6,638.04, 9,953.12 and 2,938.40

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Solution

The fourth proportional to 6,638.04, 9,953.12 and 2,938.40 is: 4,405.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,638.04 : 9,953.12 = 2,938.40 : x
  2. Step 2: Convert to fraction form
    6,638.04/9,953.12 = 2,938.40/x
  3. Step 3: Cross multiply
    6,638.04x = 9,953.12 × 2,938.40
  4. Step 4: Simplify right side
    6,638.04x = 29,246,247.81
  5. Step 5: Solve for x
    x = 29,246,247.81/6,638.04
  6. Step 6: Final answer
    x = 4,405.86

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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.