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Finding the Fourth Proportional to 19,307.65, 28,916.49 and 18,775.54

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Solution

The fourth proportional to 19,307.65, 28,916.49 and 18,775.54 is: 28,119.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,307.65 : 28,916.49 = 18,775.54 : x
  2. Step 2: Convert to fraction form
    19,307.65/28,916.49 = 18,775.54/x
  3. Step 3: Cross multiply
    19,307.65x = 28,916.49 × 18,775.54
  4. Step 4: Simplify right side
    19,307.65x = 542,922,620.78
  5. Step 5: Solve for x
    x = 542,922,620.78/19,307.65
  6. Step 6: Final answer
    x = 28,119.57

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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.