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Finding the Fourth Proportional to 20,846.68, 28,748.46 and 19,319.56

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Solution

The fourth proportional to 20,846.68, 28,748.46 and 19,319.56 is: 26,642.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,846.68 : 28,748.46 = 19,319.56 : x
  2. Step 2: Convert to fraction form
    20,846.68/28,748.46 = 19,319.56/x
  3. Step 3: Cross multiply
    20,846.68x = 28,748.46 × 19,319.56
  4. Step 4: Simplify right side
    20,846.68x = 555,407,597.88
  5. Step 5: Solve for x
    x = 555,407,597.88/20,846.68
  6. Step 6: Final answer
    x = 26,642.50

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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.