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Finding the Fourth Proportional to 18,857.40, 26,023.17 and 12,888.93

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Solution

The fourth proportional to 18,857.40, 26,023.17 and 12,888.93 is: 17,786.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,857.40 : 26,023.17 = 12,888.93 : x
  2. Step 2: Convert to fraction form
    18,857.40/26,023.17 = 12,888.93/x
  3. Step 3: Cross multiply
    18,857.40x = 26,023.17 × 12,888.93
  4. Step 4: Simplify right side
    18,857.40x = 335,410,816.51
  5. Step 5: Solve for x
    x = 335,410,816.51/18,857.40
  6. Step 6: Final answer
    x = 17,786.69

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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.