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Finding the Fourth Proportional to 19,064.86, 28,605.13 and 8,385.72

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Solution

The fourth proportional to 19,064.86, 28,605.13 and 8,385.72 is: 12,582.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,064.86 : 28,605.13 = 8,385.72 : x
  2. Step 2: Convert to fraction form
    19,064.86/28,605.13 = 8,385.72/x
  3. Step 3: Cross multiply
    19,064.86x = 28,605.13 × 8,385.72
  4. Step 4: Simplify right side
    19,064.86x = 239,874,574.75
  5. Step 5: Solve for x
    x = 239,874,574.75/19,064.86
  6. Step 6: Final answer
    x = 12,582.03

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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.