Home / 21,042.15-29,025.92-13,485.80

Finding the Fourth Proportional to 21,042.15, 29,025.92 and 13,485.80

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Solution

The fourth proportional to 21,042.15, 29,025.92 and 13,485.80 is: 18,602.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,042.15 : 29,025.92 = 13,485.80 : x
  2. Step 2: Convert to fraction form
    21,042.15/29,025.92 = 13,485.80/x
  3. Step 3: Cross multiply
    21,042.15x = 29,025.92 × 13,485.80
  4. Step 4: Simplify right side
    21,042.15x = 391,437,640.52
  5. Step 5: Solve for x
    x = 391,437,640.52/21,042.15
  6. Step 6: Final answer
    x = 18,602.55

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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.