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Finding the Fourth Proportional to 19,343, 28,969.50 and 18,810.90

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Solution

The fourth proportional to 19,343, 28,969.50 and 18,810.90 is: 28,172.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,343 : 28,969.50 = 18,810.90 : x
  2. Step 2: Convert to fraction form
    19,343/28,969.50 = 18,810.90/x
  3. Step 3: Cross multiply
    19,343x = 28,969.50 × 18,810.90
  4. Step 4: Simplify right side
    19,343x = 544,942,367.55
  5. Step 5: Solve for x
    x = 544,942,367.55/19,343
  6. Step 6: Final answer
    x = 28,172.59

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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.