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Finding the Fourth Proportional to 19,447.28, 28,986.25 and 18,340.28

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Solution

The fourth proportional to 19,447.28, 28,986.25 and 18,340.28 is: 27,336.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,447.28 : 28,986.25 = 18,340.28 : x
  2. Step 2: Convert to fraction form
    19,447.28/28,986.25 = 18,340.28/x
  3. Step 3: Cross multiply
    19,447.28x = 28,986.25 × 18,340.28
  4. Step 4: Simplify right side
    19,447.28x = 531,615,941.15
  5. Step 5: Solve for x
    x = 531,615,941.15/19,447.28
  6. Step 6: Final answer
    x = 27,336.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.