Home / 19,790.10-27,328.84-12,728.78

Finding the Fourth Proportional to 19,790.10, 27,328.84 and 12,728.78

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Solution

The fourth proportional to 19,790.10, 27,328.84 and 12,728.78 is: 17,577.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,790.10 : 27,328.84 = 12,728.78 : x
  2. Step 2: Convert to fraction form
    19,790.10/27,328.84 = 12,728.78/x
  3. Step 3: Cross multiply
    19,790.10x = 27,328.84 × 12,728.78
  4. Step 4: Simplify right side
    19,790.10x = 347,862,792.02
  5. Step 5: Solve for x
    x = 347,862,792.02/19,790.10
  6. Step 6: Final answer
    x = 17,577.62

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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.