Home / 21,038.75-29,032.85-11,478.83

Finding the Fourth Proportional to 21,038.75, 29,032.85 and 11,478.83

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Solution

The fourth proportional to 21,038.75, 29,032.85 and 11,478.83 is: 15,840.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,038.75 : 29,032.85 = 11,478.83 : x
  2. Step 2: Convert to fraction form
    21,038.75/29,032.85 = 11,478.83/x
  3. Step 3: Cross multiply
    21,038.75x = 29,032.85 × 11,478.83
  4. Step 4: Simplify right side
    21,038.75x = 333,262,947.01
  5. Step 5: Solve for x
    x = 333,262,947.01/21,038.75
  6. Step 6: Final answer
    x = 15,840.43

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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.