Home / 12,961.04-17,880.60-8,242.78

Finding the Fourth Proportional to 12,961.04, 17,880.60 and 8,242.78

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Solution

The fourth proportional to 12,961.04, 17,880.60 and 8,242.78 is: 11,371.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,961.04 : 17,880.60 = 8,242.78 : x
  2. Step 2: Convert to fraction form
    12,961.04/17,880.60 = 8,242.78/x
  3. Step 3: Cross multiply
    12,961.04x = 17,880.60 × 8,242.78
  4. Step 4: Simplify right side
    12,961.04x = 147,385,852.07
  5. Step 5: Solve for x
    x = 147,385,852.07/12,961.04
  6. Step 6: Final answer
    x = 11,371.45

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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.