Home / 30,688.58-42,353.49-18,758.90

Finding the Fourth Proportional to 30,688.58, 42,353.49 and 18,758.90

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Solution

The fourth proportional to 30,688.58, 42,353.49 and 18,758.90 is: 25,889.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,688.58 : 42,353.49 = 18,758.90 : x
  2. Step 2: Convert to fraction form
    30,688.58/42,353.49 = 18,758.90/x
  3. Step 3: Cross multiply
    30,688.58x = 42,353.49 × 18,758.90
  4. Step 4: Simplify right side
    30,688.58x = 794,504,883.56
  5. Step 5: Solve for x
    x = 794,504,883.56/30,688.58
  6. Step 6: Final answer
    x = 25,889.27

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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.