Home / 30,530.31-42,146.26-20,465.33

Finding the Fourth Proportional to 30,530.31, 42,146.26 and 20,465.33

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Solution

The fourth proportional to 30,530.31, 42,146.26 and 20,465.33 is: 28,251.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,530.31 : 42,146.26 = 20,465.33 : x
  2. Step 2: Convert to fraction form
    30,530.31/42,146.26 = 20,465.33/x
  3. Step 3: Cross multiply
    30,530.31x = 42,146.26 × 20,465.33
  4. Step 4: Simplify right side
    30,530.31x = 862,537,119.17
  5. Step 5: Solve for x
    x = 862,537,119.17/30,530.31
  6. Step 6: Final answer
    x = 28,251.83

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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.