Home / 19,911.51-29,858.05-7,428.19

Finding the Fourth Proportional to 19,911.51, 29,858.05 and 7,428.19

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Solution

The fourth proportional to 19,911.51, 29,858.05 and 7,428.19 is: 11,138.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,911.51 : 29,858.05 = 7,428.19 : x
  2. Step 2: Convert to fraction form
    19,911.51/29,858.05 = 7,428.19/x
  3. Step 3: Cross multiply
    19,911.51x = 29,858.05 × 7,428.19
  4. Step 4: Simplify right side
    19,911.51x = 221,791,268.43
  5. Step 5: Solve for x
    x = 221,791,268.43/19,911.51
  6. Step 6: Final answer
    x = 11,138.85

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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.