Home / 19,388.69-26,749.58-12,678.24

Finding the Fourth Proportional to 19,388.69, 26,749.58 and 12,678.24

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Solution

The fourth proportional to 19,388.69, 26,749.58 and 12,678.24 is: 17,491.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,388.69 : 26,749.58 = 12,678.24 : x
  2. Step 2: Convert to fraction form
    19,388.69/26,749.58 = 12,678.24/x
  3. Step 3: Cross multiply
    19,388.69x = 26,749.58 × 12,678.24
  4. Step 4: Simplify right side
    19,388.69x = 339,137,531.75
  5. Step 5: Solve for x
    x = 339,137,531.75/19,388.69
  6. Step 6: Final answer
    x = 17,491.52

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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.