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Finding the Fourth Proportional to 18,802.56, 25,917.08 and 12,750.80

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Solution

The fourth proportional to 18,802.56, 25,917.08 and 12,750.80 is: 17,575.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,802.56 : 25,917.08 = 12,750.80 : x
  2. Step 2: Convert to fraction form
    18,802.56/25,917.08 = 12,750.80/x
  3. Step 3: Cross multiply
    18,802.56x = 25,917.08 × 12,750.80
  4. Step 4: Simplify right side
    18,802.56x = 330,463,503.66
  5. Step 5: Solve for x
    x = 330,463,503.66/18,802.56
  6. Step 6: Final answer
    x = 17,575.45

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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.