Home / 30,785.40-42,487.47-18,850.32

Finding the Fourth Proportional to 30,785.40, 42,487.47 and 18,850.32

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Solution

The fourth proportional to 30,785.40, 42,487.47 and 18,850.32 is: 26,015.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,785.40 : 42,487.47 = 18,850.32 : x
  2. Step 2: Convert to fraction form
    30,785.40/42,487.47 = 18,850.32/x
  3. Step 3: Cross multiply
    30,785.40x = 42,487.47 × 18,850.32
  4. Step 4: Simplify right side
    30,785.40x = 800,902,405.49
  5. Step 5: Solve for x
    x = 800,902,405.49/30,785.40
  6. Step 6: Final answer
    x = 26,015.66

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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.