Home / 28,119.40-38,811.30-18,688.36

Finding the Fourth Proportional to 28,119.40, 38,811.30 and 18,688.36

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Solution

The fourth proportional to 28,119.40, 38,811.30 and 18,688.36 is: 25,794.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,119.40 : 38,811.30 = 18,688.36 : x
  2. Step 2: Convert to fraction form
    28,119.40/38,811.30 = 18,688.36/x
  3. Step 3: Cross multiply
    28,119.40x = 38,811.30 × 18,688.36
  4. Step 4: Simplify right side
    28,119.40x = 725,319,546.47
  5. Step 5: Solve for x
    x = 725,319,546.47/28,119.40
  6. Step 6: Final answer
    x = 25,794.28

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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.