Home / 12,878.24-17,768.40-7,289.12

Finding the Fourth Proportional to 12,878.24, 17,768.40 and 7,289.12

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Solution

The fourth proportional to 12,878.24, 17,768.40 and 7,289.12 is: 10,056.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,878.24 : 17,768.40 = 7,289.12 : x
  2. Step 2: Convert to fraction form
    12,878.24/17,768.40 = 7,289.12/x
  3. Step 3: Cross multiply
    12,878.24x = 17,768.40 × 7,289.12
  4. Step 4: Simplify right side
    12,878.24x = 129,515,999.81
  5. Step 5: Solve for x
    x = 129,515,999.81/12,878.24
  6. Step 6: Final answer
    x = 10,056.96

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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.