Home / 20,651.95-28,499.34-11,220.45

Finding the Fourth Proportional to 20,651.95, 28,499.34 and 11,220.45

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Solution

The fourth proportional to 20,651.95, 28,499.34 and 11,220.45 is: 15,484.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.95 : 28,499.34 = 11,220.45 : x
  2. Step 2: Convert to fraction form
    20,651.95/28,499.34 = 11,220.45/x
  3. Step 3: Cross multiply
    20,651.95x = 28,499.34 × 11,220.45
  4. Step 4: Simplify right side
    20,651.95x = 319,775,419.50
  5. Step 5: Solve for x
    x = 319,775,419.50/20,651.95
  6. Step 6: Final answer
    x = 15,484.03

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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.