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Finding the Fourth Proportional to 18,681.98, 25,728.64 and 18,273.74

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Solution

The fourth proportional to 18,681.98, 25,728.64 and 18,273.74 is: 25,166.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,681.98 : 25,728.64 = 18,273.74 : x
  2. Step 2: Convert to fraction form
    18,681.98/25,728.64 = 18,273.74/x
  3. Step 3: Cross multiply
    18,681.98x = 25,728.64 × 18,273.74
  4. Step 4: Simplify right side
    18,681.98x = 470,158,303.59
  5. Step 5: Solve for x
    x = 470,158,303.59/18,681.98
  6. Step 6: Final answer
    x = 25,166.41

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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.