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Finding the Fourth Proportional to 8,926.88, 12,319.04 and 5,390.08

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Solution

The fourth proportional to 8,926.88, 12,319.04 and 5,390.08 is: 7,438.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,926.88 : 12,319.04 = 5,390.08 : x
  2. Step 2: Convert to fraction form
    8,926.88/12,319.04 = 5,390.08/x
  3. Step 3: Cross multiply
    8,926.88x = 12,319.04 × 5,390.08
  4. Step 4: Simplify right side
    8,926.88x = 66,400,611.12
  5. Step 5: Solve for x
    x = 66,400,611.12/8,926.88
  6. Step 6: Final answer
    x = 7,438.28

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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.