Home / 12,816.42-19,215.40-7,875.85

Finding the Fourth Proportional to 12,816.42, 19,215.40 and 7,875.85

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Solution

The fourth proportional to 12,816.42, 19,215.40 and 7,875.85 is: 11,808.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,816.42 : 19,215.40 = 7,875.85 : x
  2. Step 2: Convert to fraction form
    12,816.42/19,215.40 = 7,875.85/x
  3. Step 3: Cross multiply
    12,816.42x = 19,215.40 × 7,875.85
  4. Step 4: Simplify right side
    12,816.42x = 151,337,608.09
  5. Step 5: Solve for x
    x = 151,337,608.09/12,816.42
  6. Step 6: Final answer
    x = 11,808.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.