Home / 40,381.72-55,688.12-30,804.60

Finding the Fourth Proportional to 40,381.72, 55,688.12 and 30,804.60

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Solution

The fourth proportional to 40,381.72, 55,688.12 and 30,804.60 is: 42,480.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,381.72 : 55,688.12 = 30,804.60 : x
  2. Step 2: Convert to fraction form
    40,381.72/55,688.12 = 30,804.60/x
  3. Step 3: Cross multiply
    40,381.72x = 55,688.12 × 30,804.60
  4. Step 4: Simplify right side
    40,381.72x = 1,715,450,261.35
  5. Step 5: Solve for x
    x = 1,715,450,261.35/40,381.72
  6. Step 6: Final answer
    x = 42,480.86

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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.