Home / 30,643.23-42,292.57-28,642.12

Finding the Fourth Proportional to 30,643.23, 42,292.57 and 28,642.12

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Solution

The fourth proportional to 30,643.23, 42,292.57 and 28,642.12 is: 39,530.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,643.23 : 42,292.57 = 28,642.12 : x
  2. Step 2: Convert to fraction form
    30,643.23/42,292.57 = 28,642.12/x
  3. Step 3: Cross multiply
    30,643.23x = 42,292.57 × 28,642.12
  4. Step 4: Simplify right side
    30,643.23x = 1,211,348,936.65
  5. Step 5: Solve for x
    x = 1,211,348,936.65/30,643.23
  6. Step 6: Final answer
    x = 39,530.73

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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.