Home / 8,913.03-12,356.25-8,439

Finding the Fourth Proportional to 8,913.03, 12,356.25 and 8,439

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Solution

The fourth proportional to 8,913.03, 12,356.25 and 8,439 is: 11,699.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,913.03 : 12,356.25 = 8,439 : x
  2. Step 2: Convert to fraction form
    8,913.03/12,356.25 = 8,439/x
  3. Step 3: Cross multiply
    8,913.03x = 12,356.25 × 8,439
  4. Step 4: Simplify right side
    8,913.03x = 104,274,393.75
  5. Step 5: Solve for x
    x = 104,274,393.75/8,913.03
  6. Step 6: Final answer
    x = 11,699.10

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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.