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Finding the Fourth Proportional to 28,035.21, 42,045.65 and 8,309.15

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Solution

The fourth proportional to 28,035.21, 42,045.65 and 8,309.15 is: 12,461.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,035.21 : 42,045.65 = 8,309.15 : x
  2. Step 2: Convert to fraction form
    28,035.21/42,045.65 = 8,309.15/x
  3. Step 3: Cross multiply
    28,035.21x = 42,045.65 × 8,309.15
  4. Step 4: Simplify right side
    28,035.21x = 349,363,738.58
  5. Step 5: Solve for x
    x = 349,363,738.58/28,035.21
  6. Step 6: Final answer
    x = 12,461.61

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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.