Home / 30,978.72-46,467.36-9,090.72

Finding the Fourth Proportional to 30,978.72, 46,467.36 and 9,090.72

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Solution

The fourth proportional to 30,978.72, 46,467.36 and 9,090.72 is: 13,635.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,978.72 : 46,467.36 = 9,090.72 : x
  2. Step 2: Convert to fraction form
    30,978.72/46,467.36 = 9,090.72/x
  3. Step 3: Cross multiply
    30,978.72x = 46,467.36 × 9,090.72
  4. Step 4: Simplify right side
    30,978.72x = 422,421,758.90
  5. Step 5: Solve for x
    x = 422,421,758.90/30,978.72
  6. Step 6: Final answer
    x = 13,635.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.