Home / 20,554.89-28,365.74-11,123.45

Finding the Fourth Proportional to 20,554.89, 28,365.74 and 11,123.45

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Solution

The fourth proportional to 20,554.89, 28,365.74 and 11,123.45 is: 15,350.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,554.89 : 28,365.74 = 11,123.45 : x
  2. Step 2: Convert to fraction form
    20,554.89/28,365.74 = 11,123.45/x
  3. Step 3: Cross multiply
    20,554.89x = 28,365.74 × 11,123.45
  4. Step 4: Simplify right side
    20,554.89x = 315,524,748.77
  5. Step 5: Solve for x
    x = 315,524,748.77/20,554.89
  6. Step 6: Final answer
    x = 15,350.35

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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.