Home / 30,933.36-42,684.84-18,355.68

Finding the Fourth Proportional to 30,933.36, 42,684.84 and 18,355.68

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Solution

The fourth proportional to 30,933.36, 42,684.84 and 18,355.68 is: 25,328.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,933.36 : 42,684.84 = 18,355.68 : x
  2. Step 2: Convert to fraction form
    30,933.36/42,684.84 = 18,355.68/x
  3. Step 3: Cross multiply
    30,933.36x = 42,684.84 × 18,355.68
  4. Step 4: Simplify right side
    30,933.36x = 783,509,263.89
  5. Step 5: Solve for x
    x = 783,509,263.89/30,933.36
  6. Step 6: Final answer
    x = 25,328.94

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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.