Home / 30,509.28-45,840.60-19,420.92

Finding the Fourth Proportional to 30,509.28, 45,840.60 and 19,420.92

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Solution

The fourth proportional to 30,509.28, 45,840.60 and 19,420.92 is: 29,180.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,509.28 : 45,840.60 = 19,420.92 : x
  2. Step 2: Convert to fraction form
    30,509.28/45,840.60 = 19,420.92/x
  3. Step 3: Cross multiply
    30,509.28x = 45,840.60 × 19,420.92
  4. Step 4: Simplify right side
    30,509.28x = 890,266,625.35
  5. Step 5: Solve for x
    x = 890,266,625.35/30,509.28
  6. Step 6: Final answer
    x = 29,180.19

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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.