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Finding the Fourth Proportional to 18,713.59, 28,053.87 and 7,629.55

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Solution

The fourth proportional to 18,713.59, 28,053.87 and 7,629.55 is: 11,437.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,713.59 : 28,053.87 = 7,629.55 : x
  2. Step 2: Convert to fraction form
    18,713.59/28,053.87 = 7,629.55/x
  3. Step 3: Cross multiply
    18,713.59x = 28,053.87 × 7,629.55
  4. Step 4: Simplify right side
    18,713.59x = 214,038,403.86
  5. Step 5: Solve for x
    x = 214,038,403.86/18,713.59
  6. Step 6: Final answer
    x = 11,437.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.