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Finding the Fourth Proportional to 18,645.24, 27,967.92 and 12,784.08

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Solution

The fourth proportional to 18,645.24, 27,967.92 and 12,784.08 is: 19,176.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,645.24 : 27,967.92 = 12,784.08 : x
  2. Step 2: Convert to fraction form
    18,645.24/27,967.92 = 12,784.08/x
  3. Step 3: Cross multiply
    18,645.24x = 27,967.92 × 12,784.08
  4. Step 4: Simplify right side
    18,645.24x = 357,544,126.71
  5. Step 5: Solve for x
    x = 357,544,126.71/18,645.24
  6. Step 6: Final answer
    x = 19,176.16

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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.