Home / 21,018.40-29,006.76-12,068.80

Finding the Fourth Proportional to 21,018.40, 29,006.76 and 12,068.80

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Solution

The fourth proportional to 21,018.40, 29,006.76 and 12,068.80 is: 16,655.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.40 : 29,006.76 = 12,068.80 : x
  2. Step 2: Convert to fraction form
    21,018.40/29,006.76 = 12,068.80/x
  3. Step 3: Cross multiply
    21,018.40x = 29,006.76 × 12,068.80
  4. Step 4: Simplify right side
    21,018.40x = 350,076,785.09
  5. Step 5: Solve for x
    x = 350,076,785.09/21,018.40
  6. Step 6: Final answer
    x = 16,655.73

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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.