Home / 31,319.49-43,208.85-19,989.39

Finding the Fourth Proportional to 31,319.49, 43,208.85 and 19,989.39

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Solution

The fourth proportional to 31,319.49, 43,208.85 and 19,989.39 is: 27,577.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,319.49 : 43,208.85 = 19,989.39 : x
  2. Step 2: Convert to fraction form
    31,319.49/43,208.85 = 19,989.39/x
  3. Step 3: Cross multiply
    31,319.49x = 43,208.85 × 19,989.39
  4. Step 4: Simplify right side
    31,319.49x = 863,718,554.10
  5. Step 5: Solve for x
    x = 863,718,554.10/31,319.49
  6. Step 6: Final answer
    x = 27,577.67

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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.