Home / 30,720.51-46,049.99-19,639.71

Finding the Fourth Proportional to 30,720.51, 46,049.99 and 19,639.71

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Solution

The fourth proportional to 30,720.51, 46,049.99 and 19,639.71 is: 29,439.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,720.51 : 46,049.99 = 19,639.71 : x
  2. Step 2: Convert to fraction form
    30,720.51/46,049.99 = 19,639.71/x
  3. Step 3: Cross multiply
    30,720.51x = 46,049.99 × 19,639.71
  4. Step 4: Simplify right side
    30,720.51x = 904,408,350.90
  5. Step 5: Solve for x
    x = 904,408,350.90/30,720.51
  6. Step 6: Final answer
    x = 29,439.89

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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.