Home / 30,690.18-42,323.58-28,399.32

Finding the Fourth Proportional to 30,690.18, 42,323.58 and 28,399.32

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Solution

The fourth proportional to 30,690.18, 42,323.58 and 28,399.32 is: 39,164.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,690.18 : 42,323.58 = 28,399.32 : x
  2. Step 2: Convert to fraction form
    30,690.18/42,323.58 = 28,399.32/x
  3. Step 3: Cross multiply
    30,690.18x = 42,323.58 × 28,399.32
  4. Step 4: Simplify right side
    30,690.18x = 1,201,960,891.97
  5. Step 5: Solve for x
    x = 1,201,960,891.97/30,690.18
  6. Step 6: Final answer
    x = 39,164.35

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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.