Home / 21,085.12-29,092.80-12,704.32

Finding the Fourth Proportional to 21,085.12, 29,092.80 and 12,704.32

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Solution

The fourth proportional to 21,085.12, 29,092.80 and 12,704.32 is: 17,529.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,085.12 : 29,092.80 = 12,704.32 : x
  2. Step 2: Convert to fraction form
    21,085.12/29,092.80 = 12,704.32/x
  3. Step 3: Cross multiply
    21,085.12x = 29,092.80 × 12,704.32
  4. Step 4: Simplify right side
    21,085.12x = 369,604,240.90
  5. Step 5: Solve for x
    x = 369,604,240.90/21,085.12
  6. Step 6: Final answer
    x = 17,529.15

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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.