Home / 19,970.12-27,571.92-12,427.40

Finding the Fourth Proportional to 19,970.12, 27,571.92 and 12,427.40

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Solution

The fourth proportional to 19,970.12, 27,571.92 and 12,427.40 is: 17,158.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,970.12 : 27,571.92 = 12,427.40 : x
  2. Step 2: Convert to fraction form
    19,970.12/27,571.92 = 12,427.40/x
  3. Step 3: Cross multiply
    19,970.12x = 27,571.92 × 12,427.40
  4. Step 4: Simplify right side
    19,970.12x = 342,647,278.61
  5. Step 5: Solve for x
    x = 342,647,278.61/19,970.12
  6. Step 6: Final answer
    x = 17,158.00

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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.