Home / 28,955.32-39,983.28-18,218.10

Finding the Fourth Proportional to 28,955.32, 39,983.28 and 18,218.10

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Solution

The fourth proportional to 28,955.32, 39,983.28 and 18,218.10 is: 25,156.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,955.32 : 39,983.28 = 18,218.10 : x
  2. Step 2: Convert to fraction form
    28,955.32/39,983.28 = 18,218.10/x
  3. Step 3: Cross multiply
    28,955.32x = 39,983.28 × 18,218.10
  4. Step 4: Simplify right side
    28,955.32x = 728,419,393.37
  5. Step 5: Solve for x
    x = 728,419,393.37/28,955.32
  6. Step 6: Final answer
    x = 25,156.67

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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.