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Finding the Fourth Proportional to 28,345.50, 42,520.01 and 8,625.51

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Solution

The fourth proportional to 28,345.50, 42,520.01 and 8,625.51 is: 12,938.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,345.50 : 42,520.01 = 8,625.51 : x
  2. Step 2: Convert to fraction form
    28,345.50/42,520.01 = 8,625.51/x
  3. Step 3: Cross multiply
    28,345.50x = 42,520.01 × 8,625.51
  4. Step 4: Simplify right side
    28,345.50x = 366,756,728.33
  5. Step 5: Solve for x
    x = 366,756,728.33/28,345.50
  6. Step 6: Final answer
    x = 12,938.80

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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.