Home / 20,770.02-28,686.53-15,129.99

Finding the Fourth Proportional to 20,770.02, 28,686.53 and 15,129.99

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Solution

The fourth proportional to 20,770.02, 28,686.53 and 15,129.99 is: 20,896.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.02 : 28,686.53 = 15,129.99 : x
  2. Step 2: Convert to fraction form
    20,770.02/28,686.53 = 15,129.99/x
  3. Step 3: Cross multiply
    20,770.02x = 28,686.53 × 15,129.99
  4. Step 4: Simplify right side
    20,770.02x = 434,027,057.43
  5. Step 5: Solve for x
    x = 434,027,057.43/20,770.02
  6. Step 6: Final answer
    x = 20,896.80

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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.