Home / 21,038.81-28,998.33-18,480.02

Finding the Fourth Proportional to 21,038.81, 28,998.33 and 18,480.02

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Solution

The fourth proportional to 21,038.81, 28,998.33 and 18,480.02 is: 25,471.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,038.81 : 28,998.33 = 18,480.02 : x
  2. Step 2: Convert to fraction form
    21,038.81/28,998.33 = 18,480.02/x
  3. Step 3: Cross multiply
    21,038.81x = 28,998.33 × 18,480.02
  4. Step 4: Simplify right side
    21,038.81x = 535,889,718.37
  5. Step 5: Solve for x
    x = 535,889,718.37/21,038.81
  6. Step 6: Final answer
    x = 25,471.48

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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.