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Finding the Fourth Proportional to 18,649.28, 28,012.80 and 15,733.28

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Solution

The fourth proportional to 18,649.28, 28,012.80 and 15,733.28 is: 23,632.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,649.28 : 28,012.80 = 15,733.28 : x
  2. Step 2: Convert to fraction form
    18,649.28/28,012.80 = 15,733.28/x
  3. Step 3: Cross multiply
    18,649.28x = 28,012.80 × 15,733.28
  4. Step 4: Simplify right side
    18,649.28x = 440,733,225.98
  5. Step 5: Solve for x
    x = 440,733,225.98/18,649.28
  6. Step 6: Final answer
    x = 23,632.72

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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.