Home / 21,102.12-29,106.54-13,545.36

Finding the Fourth Proportional to 21,102.12, 29,106.54 and 13,545.36

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Solution

The fourth proportional to 21,102.12, 29,106.54 and 13,545.36 is: 18,683.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.12 : 29,106.54 = 13,545.36 : x
  2. Step 2: Convert to fraction form
    21,102.12/29,106.54 = 13,545.36/x
  3. Step 3: Cross multiply
    21,102.12x = 29,106.54 × 13,545.36
  4. Step 4: Simplify right side
    21,102.12x = 394,258,562.65
  5. Step 5: Solve for x
    x = 394,258,562.65/21,102.12
  6. Step 6: Final answer
    x = 18,683.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.