Home / 21,076.98-29,077.10-12,688.62

Finding the Fourth Proportional to 21,076.98, 29,077.10 and 12,688.62

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Solution

The fourth proportional to 21,076.98, 29,077.10 and 12,688.62 is: 17,504.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,076.98 : 29,077.10 = 12,688.62 : x
  2. Step 2: Convert to fraction form
    21,076.98/29,077.10 = 12,688.62/x
  3. Step 3: Cross multiply
    21,076.98x = 29,077.10 × 12,688.62
  4. Step 4: Simplify right side
    21,076.98x = 368,948,272.60
  5. Step 5: Solve for x
    x = 368,948,272.60/21,076.98
  6. Step 6: Final answer
    x = 17,504.80

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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.