Home / 19,887.80-27,439.56-12,818.32

Finding the Fourth Proportional to 19,887.80, 27,439.56 and 12,818.32

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Solution

The fourth proportional to 19,887.80, 27,439.56 and 12,818.32 is: 17,685.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,887.80 : 27,439.56 = 12,818.32 : x
  2. Step 2: Convert to fraction form
    19,887.80/27,439.56 = 12,818.32/x
  3. Step 3: Cross multiply
    19,887.80x = 27,439.56 × 12,818.32
  4. Step 4: Simplify right side
    19,887.80x = 351,728,992.14
  5. Step 5: Solve for x
    x = 351,728,992.14/19,887.80
  6. Step 6: Final answer
    x = 17,685.67

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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.