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Finding the Fourth Proportional to 43,664.64, 65,516.64 and 18,711.24

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Solution

The fourth proportional to 43,664.64, 65,516.64 and 18,711.24 is: 28,075.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,664.64 : 65,516.64 = 18,711.24 : x
  2. Step 2: Convert to fraction form
    43,664.64/65,516.64 = 18,711.24/x
  3. Step 3: Cross multiply
    43,664.64x = 65,516.64 × 18,711.24
  4. Step 4: Simplify right side
    43,664.64x = 1,225,897,575.03
  5. Step 5: Solve for x
    x = 1,225,897,575.03/43,664.64
  6. Step 6: Final answer
    x = 28,075.29

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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.