Home / 12,678.40-19,015.80-4,358.80

Finding the Fourth Proportional to 12,678.40, 19,015.80 and 4,358.80

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Solution

The fourth proportional to 12,678.40, 19,015.80 and 4,358.80 is: 6,537.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.40 : 19,015.80 = 4,358.80 : x
  2. Step 2: Convert to fraction form
    12,678.40/19,015.80 = 4,358.80/x
  3. Step 3: Cross multiply
    12,678.40x = 19,015.80 × 4,358.80
  4. Step 4: Simplify right side
    12,678.40x = 82,886,069.04
  5. Step 5: Solve for x
    x = 82,886,069.04/12,678.40
  6. Step 6: Final answer
    x = 6,537.58

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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.