Home / 30,790.97-42,491.55-16,643.81

Finding the Fourth Proportional to 30,790.97, 42,491.55 and 16,643.81

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Solution

The fourth proportional to 30,790.97, 42,491.55 and 16,643.81 is: 22,968.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,790.97 : 42,491.55 = 16,643.81 : x
  2. Step 2: Convert to fraction form
    30,790.97/42,491.55 = 16,643.81/x
  3. Step 3: Cross multiply
    30,790.97x = 42,491.55 × 16,643.81
  4. Step 4: Simplify right side
    30,790.97x = 707,221,453.45
  5. Step 5: Solve for x
    x = 707,221,453.45/30,790.97
  6. Step 6: Final answer
    x = 22,968.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.