Home / 20,128.48-27,777.39-12,579.19

Finding the Fourth Proportional to 20,128.48, 27,777.39 and 12,579.19

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Solution

The fourth proportional to 20,128.48, 27,777.39 and 12,579.19 is: 17,359.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.48 : 27,777.39 = 12,579.19 : x
  2. Step 2: Convert to fraction form
    20,128.48/27,777.39 = 12,579.19/x
  3. Step 3: Cross multiply
    20,128.48x = 27,777.39 × 12,579.19
  4. Step 4: Simplify right side
    20,128.48x = 349,417,066.51
  5. Step 5: Solve for x
    x = 349,417,066.51/20,128.48
  6. Step 6: Final answer
    x = 17,359.34

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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.