Home / 30,185.81-45,272.23-18,935.72

Finding the Fourth Proportional to 30,185.81, 45,272.23 and 18,935.72

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Solution

The fourth proportional to 30,185.81, 45,272.23 and 18,935.72 is: 28,399.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,185.81 : 45,272.23 = 18,935.72 : x
  2. Step 2: Convert to fraction form
    30,185.81/45,272.23 = 18,935.72/x
  3. Step 3: Cross multiply
    30,185.81x = 45,272.23 × 18,935.72
  4. Step 4: Simplify right side
    30,185.81x = 857,262,167.13
  5. Step 5: Solve for x
    x = 857,262,167.13/30,185.81
  6. Step 6: Final answer
    x = 28,399.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.