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Finding the Fourth Proportional to 28,028.55, 42,042.98 and 8,307.28

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Solution

The fourth proportional to 28,028.55, 42,042.98 and 8,307.28 is: 12,460.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,028.55 : 42,042.98 = 8,307.28 : x
  2. Step 2: Convert to fraction form
    28,028.55/42,042.98 = 8,307.28/x
  3. Step 3: Cross multiply
    28,028.55x = 42,042.98 × 8,307.28
  4. Step 4: Simplify right side
    28,028.55x = 349,262,806.89
  5. Step 5: Solve for x
    x = 349,262,806.89/28,028.55
  6. Step 6: Final answer
    x = 12,460.97

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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.