Home / 30,931.03-42,684.37-18,185.65

Finding the Fourth Proportional to 30,931.03, 42,684.37 and 18,185.65

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Solution

The fourth proportional to 30,931.03, 42,684.37 and 18,185.65 is: 25,095.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,931.03 : 42,684.37 = 18,185.65 : x
  2. Step 2: Convert to fraction form
    30,931.03/42,684.37 = 18,185.65/x
  3. Step 3: Cross multiply
    30,931.03x = 42,684.37 × 18,185.65
  4. Step 4: Simplify right side
    30,931.03x = 776,242,861.12
  5. Step 5: Solve for x
    x = 776,242,861.12/30,931.03
  6. Step 6: Final answer
    x = 25,095.93

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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.