Home / 12,678.21-19,012.59-4,355.87

Finding the Fourth Proportional to 12,678.21, 19,012.59 and 4,355.87

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Solution

The fourth proportional to 12,678.21, 19,012.59 and 4,355.87 is: 6,532.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,678.21 : 19,012.59 = 4,355.87 : x
  2. Step 2: Convert to fraction form
    12,678.21/19,012.59 = 4,355.87/x
  3. Step 3: Cross multiply
    12,678.21x = 19,012.59 × 4,355.87
  4. Step 4: Simplify right side
    12,678.21x = 82,816,275.34
  5. Step 5: Solve for x
    x = 82,816,275.34/12,678.21
  6. Step 6: Final answer
    x = 6,532.17

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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.