Home / 18,921.67-26,122.77-12,556.89

Finding the Fourth Proportional to 18,921.67, 26,122.77 and 12,556.89

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Solution

The fourth proportional to 18,921.67, 26,122.77 and 12,556.89 is: 17,335.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.67 : 26,122.77 = 12,556.89 : x
  2. Step 2: Convert to fraction form
    18,921.67/26,122.77 = 12,556.89/x
  3. Step 3: Cross multiply
    18,921.67x = 26,122.77 × 12,556.89
  4. Step 4: Simplify right side
    18,921.67x = 328,020,749.39
  5. Step 5: Solve for x
    x = 328,020,749.39/18,921.67
  6. Step 6: Final answer
    x = 17,335.72

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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.