Home / 21,845.39-30,146.55-12,415.77

Finding the Fourth Proportional to 21,845.39, 30,146.55 and 12,415.77

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Solution

The fourth proportional to 21,845.39, 30,146.55 and 12,415.77 is: 17,133.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,845.39 : 30,146.55 = 12,415.77 : x
  2. Step 2: Convert to fraction form
    21,845.39/30,146.55 = 12,415.77/x
  3. Step 3: Cross multiply
    21,845.39x = 30,146.55 × 12,415.77
  4. Step 4: Simplify right side
    21,845.39x = 374,292,631.09
  5. Step 5: Solve for x
    x = 374,292,631.09/21,845.39
  6. Step 6: Final answer
    x = 17,133.72

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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.