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Finding the Fourth Proportional to 9,907.32, 13,669.38 and 6,128.67

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Solution

The fourth proportional to 9,907.32, 13,669.38 and 6,128.67 is: 8,455.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,907.32 : 13,669.38 = 6,128.67 : x
  2. Step 2: Convert to fraction form
    9,907.32/13,669.38 = 6,128.67/x
  3. Step 3: Cross multiply
    9,907.32x = 13,669.38 × 6,128.67
  4. Step 4: Simplify right side
    9,907.32x = 83,775,119.12
  5. Step 5: Solve for x
    x = 83,775,119.12/9,907.32
  6. Step 6: Final answer
    x = 8,455.88

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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.