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Finding the Fourth Proportional to 40,745.40, 61,128.90 and 14,447.40

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Solution

The fourth proportional to 40,745.40, 61,128.90 and 14,447.40 is: 21,674.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,745.40 : 61,128.90 = 14,447.40 : x
  2. Step 2: Convert to fraction form
    40,745.40/61,128.90 = 14,447.40/x
  3. Step 3: Cross multiply
    40,745.40x = 61,128.90 × 14,447.40
  4. Step 4: Simplify right side
    40,745.40x = 883,153,669.86
  5. Step 5: Solve for x
    x = 883,153,669.86/40,745.40
  6. Step 6: Final answer
    x = 21,674.93

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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.