Home / 19,673.57-27,160.56-12,978.65

Finding the Fourth Proportional to 19,673.57, 27,160.56 and 12,978.65

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Solution

The fourth proportional to 19,673.57, 27,160.56 and 12,978.65 is: 17,917.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,673.57 : 27,160.56 = 12,978.65 : x
  2. Step 2: Convert to fraction form
    19,673.57/27,160.56 = 12,978.65/x
  3. Step 3: Cross multiply
    19,673.57x = 27,160.56 × 12,978.65
  4. Step 4: Simplify right side
    19,673.57x = 352,507,266.24
  5. Step 5: Solve for x
    x = 352,507,266.24/19,673.57
  6. Step 6: Final answer
    x = 17,917.81

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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.