Home / 19,903.21-29,856.75-7,420.30

Finding the Fourth Proportional to 19,903.21, 29,856.75 and 7,420.30

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Solution

The fourth proportional to 19,903.21, 29,856.75 and 7,420.30 is: 11,131.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,903.21 : 29,856.75 = 7,420.30 : x
  2. Step 2: Convert to fraction form
    19,903.21/29,856.75 = 7,420.30/x
  3. Step 3: Cross multiply
    19,903.21x = 29,856.75 × 7,420.30
  4. Step 4: Simplify right side
    19,903.21x = 221,546,042.03
  5. Step 5: Solve for x
    x = 221,546,042.03/19,903.21
  6. Step 6: Final answer
    x = 11,131.17

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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.