Home / 21,068.76-29,076.12-12,118.80

Finding the Fourth Proportional to 21,068.76, 29,076.12 and 12,118.80

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Solution

The fourth proportional to 21,068.76, 29,076.12 and 12,118.80 is: 16,724.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,068.76 : 29,076.12 = 12,118.80 : x
  2. Step 2: Convert to fraction form
    21,068.76/29,076.12 = 12,118.80/x
  3. Step 3: Cross multiply
    21,068.76x = 29,076.12 × 12,118.80
  4. Step 4: Simplify right side
    21,068.76x = 352,367,683.06
  5. Step 5: Solve for x
    x = 352,367,683.06/21,068.76
  6. Step 6: Final answer
    x = 16,724.65

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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.