Home / 43,361.28-65,007.36-18,720

Finding the Fourth Proportional to 43,361.28, 65,007.36 and 18,720

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Solution

The fourth proportional to 43,361.28, 65,007.36 and 18,720 is: 28,065.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,361.28 : 65,007.36 = 18,720 : x
  2. Step 2: Convert to fraction form
    43,361.28/65,007.36 = 18,720/x
  3. Step 3: Cross multiply
    43,361.28x = 65,007.36 × 18,720
  4. Step 4: Simplify right side
    43,361.28x = 1,216,937,779.20
  5. Step 5: Solve for x
    x = 1,216,937,779.20/43,361.28
  6. Step 6: Final answer
    x = 28,065.08

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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.