Home / 12,878.20-19,317.30-7,957.45

Finding the Fourth Proportional to 12,878.20, 19,317.30 and 7,957.45

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Solution

The fourth proportional to 12,878.20, 19,317.30 and 7,957.45 is: 11,936.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,878.20 : 19,317.30 = 7,957.45 : x
  2. Step 2: Convert to fraction form
    12,878.20/19,317.30 = 7,957.45/x
  3. Step 3: Cross multiply
    12,878.20x = 19,317.30 × 7,957.45
  4. Step 4: Simplify right side
    12,878.20x = 153,716,448.89
  5. Step 5: Solve for x
    x = 153,716,448.89/12,878.20
  6. Step 6: Final answer
    x = 11,936.18

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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.