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Finding the Fourth Proportional to 18,847.90, 26,012.64 and 10,890.46

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Solution

The fourth proportional to 18,847.90, 26,012.64 and 10,890.46 is: 15,030.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,847.90 : 26,012.64 = 10,890.46 : x
  2. Step 2: Convert to fraction form
    18,847.90/26,012.64 = 10,890.46/x
  3. Step 3: Cross multiply
    18,847.90x = 26,012.64 × 10,890.46
  4. Step 4: Simplify right side
    18,847.90x = 283,289,615.41
  5. Step 5: Solve for x
    x = 283,289,615.41/18,847.90
  6. Step 6: Final answer
    x = 15,030.30

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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.