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Finding the Fourth Proportional to 9,438.84, 13,038.88 and 8,940.62

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Solution

The fourth proportional to 9,438.84, 13,038.88 and 8,940.62 is: 12,350.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,438.84 : 13,038.88 = 8,940.62 : x
  2. Step 2: Convert to fraction form
    9,438.84/13,038.88 = 8,940.62/x
  3. Step 3: Cross multiply
    9,438.84x = 13,038.88 × 8,940.62
  4. Step 4: Simplify right side
    9,438.84x = 116,575,671.31
  5. Step 5: Solve for x
    x = 116,575,671.31/9,438.84
  6. Step 6: Final answer
    x = 12,350.64

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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.