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Finding the Fourth Proportional to 5,389.86, 8,088.48 and 1,879.89

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Solution

The fourth proportional to 5,389.86, 8,088.48 and 1,879.89 is: 2,821.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,389.86 : 8,088.48 = 1,879.89 : x
  2. Step 2: Convert to fraction form
    5,389.86/8,088.48 = 1,879.89/x
  3. Step 3: Cross multiply
    5,389.86x = 8,088.48 × 1,879.89
  4. Step 4: Simplify right side
    5,389.86x = 15,205,422.34
  5. Step 5: Solve for x
    x = 15,205,422.34/5,389.86
  6. Step 6: Final answer
    x = 2,821.11

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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.