Home / 21,079.62-31,637.61-11,728.98

Finding the Fourth Proportional to 21,079.62, 31,637.61 and 11,728.98

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Solution

The fourth proportional to 21,079.62, 31,637.61 and 11,728.98 is: 17,603.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.62 : 31,637.61 = 11,728.98 : x
  2. Step 2: Convert to fraction form
    21,079.62/31,637.61 = 11,728.98/x
  3. Step 3: Cross multiply
    21,079.62x = 31,637.61 × 11,728.98
  4. Step 4: Simplify right side
    21,079.62x = 371,076,894.94
  5. Step 5: Solve for x
    x = 371,076,894.94/21,079.62
  6. Step 6: Final answer
    x = 17,603.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.