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Finding the Fourth Proportional to 13,762.78, 20,642.40 and 4,403.77

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Solution

The fourth proportional to 13,762.78, 20,642.40 and 4,403.77 is: 6,605.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,762.78 : 20,642.40 = 4,403.77 : x
  2. Step 2: Convert to fraction form
    13,762.78/20,642.40 = 4,403.77/x
  3. Step 3: Cross multiply
    13,762.78x = 20,642.40 × 4,403.77
  4. Step 4: Simplify right side
    13,762.78x = 90,904,381.85
  5. Step 5: Solve for x
    x = 90,904,381.85/13,762.78
  6. Step 6: Final answer
    x = 6,605.09

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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.