Home / 28,106.40-42,180.38-13,315.36

Finding the Fourth Proportional to 28,106.40, 42,180.38 and 13,315.36

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Solution

The fourth proportional to 28,106.40, 42,180.38 and 13,315.36 is: 19,982.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,106.40 : 42,180.38 = 13,315.36 : x
  2. Step 2: Convert to fraction form
    28,106.40/42,180.38 = 13,315.36/x
  3. Step 3: Cross multiply
    28,106.40x = 42,180.38 × 13,315.36
  4. Step 4: Simplify right side
    28,106.40x = 561,646,944.64
  5. Step 5: Solve for x
    x = 561,646,944.64/28,106.40
  6. Step 6: Final answer
    x = 19,982.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.