Home / 30,933.93-42,723.63-20,903.79

Finding the Fourth Proportional to 30,933.93, 42,723.63 and 20,903.79

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Solution

The fourth proportional to 30,933.93, 42,723.63 and 20,903.79 is: 28,870.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,933.93 : 42,723.63 = 20,903.79 : x
  2. Step 2: Convert to fraction form
    30,933.93/42,723.63 = 20,903.79/x
  3. Step 3: Cross multiply
    30,933.93x = 42,723.63 × 20,903.79
  4. Step 4: Simplify right side
    30,933.93x = 893,085,789.56
  5. Step 5: Solve for x
    x = 893,085,789.56/30,933.93
  6. Step 6: Final answer
    x = 28,870.75

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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.