Home / 21,328.02-29,425.41-12,942.90

Finding the Fourth Proportional to 21,328.02, 29,425.41 and 12,942.90

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Solution

The fourth proportional to 21,328.02, 29,425.41 and 12,942.90 is: 17,856.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,328.02 : 29,425.41 = 12,942.90 : x
  2. Step 2: Convert to fraction form
    21,328.02/29,425.41 = 12,942.90/x
  3. Step 3: Cross multiply
    21,328.02x = 29,425.41 × 12,942.90
  4. Step 4: Simplify right side
    21,328.02x = 380,850,139.09
  5. Step 5: Solve for x
    x = 380,850,139.09/21,328.02
  6. Step 6: Final answer
    x = 17,856.80

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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.