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Finding the Fourth Proportional to 9,638.88, 13,313.88 and 7,124.64

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Solution

The fourth proportional to 9,638.88, 13,313.88 and 7,124.64 is: 9,841.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,638.88 : 13,313.88 = 7,124.64 : x
  2. Step 2: Convert to fraction form
    9,638.88/13,313.88 = 7,124.64/x
  3. Step 3: Cross multiply
    9,638.88x = 13,313.88 × 7,124.64
  4. Step 4: Simplify right side
    9,638.88x = 94,856,602.00
  5. Step 5: Solve for x
    x = 94,856,602.00/9,638.88
  6. Step 6: Final answer
    x = 9,841.04

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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.