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Finding the Fourth Proportional to 8,919.03, 12,364.59 and 8,445

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Solution

The fourth proportional to 8,919.03, 12,364.59 and 8,445 is: 11,707.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,919.03 : 12,364.59 = 8,445 : x
  2. Step 2: Convert to fraction form
    8,919.03/12,364.59 = 8,445/x
  3. Step 3: Cross multiply
    8,919.03x = 12,364.59 × 8,445
  4. Step 4: Simplify right side
    8,919.03x = 104,418,962.55
  5. Step 5: Solve for x
    x = 104,418,962.55/8,919.03
  6. Step 6: Final answer
    x = 11,707.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.