Home / 30,786.76-42,485.65-16,639.57

Finding the Fourth Proportional to 30,786.76, 42,485.65 and 16,639.57

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Solution

The fourth proportional to 30,786.76, 42,485.65 and 16,639.57 is: 22,962.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,786.76 : 42,485.65 = 16,639.57 : x
  2. Step 2: Convert to fraction form
    30,786.76/42,485.65 = 16,639.57/x
  3. Step 3: Cross multiply
    30,786.76x = 42,485.65 × 16,639.57
  4. Step 4: Simplify right side
    30,786.76x = 706,942,947.17
  5. Step 5: Solve for x
    x = 706,942,947.17/30,786.76
  6. Step 6: Final answer
    x = 22,962.56

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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.