Home / 19,603.81-29,405.72-7,121.51

Finding the Fourth Proportional to 19,603.81, 29,405.72 and 7,121.51

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Solution

The fourth proportional to 19,603.81, 29,405.72 and 7,121.51 is: 10,682.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,603.81 : 29,405.72 = 7,121.51 : x
  2. Step 2: Convert to fraction form
    19,603.81/29,405.72 = 7,121.51/x
  3. Step 3: Cross multiply
    19,603.81x = 29,405.72 × 7,121.51
  4. Step 4: Simplify right side
    19,603.81x = 209,413,129.04
  5. Step 5: Solve for x
    x = 209,413,129.04/19,603.81
  6. Step 6: Final answer
    x = 10,682.27

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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.