Home / 30,970.60-42,739.42-16,823.43

Finding the Fourth Proportional to 30,970.60, 42,739.42 and 16,823.43

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Solution

The fourth proportional to 30,970.60, 42,739.42 and 16,823.43 is: 23,216.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,970.60 : 42,739.42 = 16,823.43 : x
  2. Step 2: Convert to fraction form
    30,970.60/42,739.42 = 16,823.43/x
  3. Step 3: Cross multiply
    30,970.60x = 42,739.42 × 16,823.43
  4. Step 4: Simplify right side
    30,970.60x = 719,023,640.61
  5. Step 5: Solve for x
    x = 719,023,640.61/30,970.60
  6. Step 6: Final answer
    x = 23,216.33

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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.