Home / 30,842.17-42,541.40-18,739.55

Finding the Fourth Proportional to 30,842.17, 42,541.40 and 18,739.55

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Solution

The fourth proportional to 30,842.17, 42,541.40 and 18,739.55 is: 25,847.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,842.17 : 42,541.40 = 18,739.55 : x
  2. Step 2: Convert to fraction form
    30,842.17/42,541.40 = 18,739.55/x
  3. Step 3: Cross multiply
    30,842.17x = 42,541.40 × 18,739.55
  4. Step 4: Simplify right side
    30,842.17x = 797,206,845.57
  5. Step 5: Solve for x
    x = 797,206,845.57/30,842.17
  6. Step 6: Final answer
    x = 25,847.95

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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.