Home / 28,212.82-42,319.70-13,418.76

Finding the Fourth Proportional to 28,212.82, 42,319.70 and 13,418.76

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Solution

The fourth proportional to 28,212.82, 42,319.70 and 13,418.76 is: 20,128.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,212.82 : 42,319.70 = 13,418.76 : x
  2. Step 2: Convert to fraction form
    28,212.82/42,319.70 = 13,418.76/x
  3. Step 3: Cross multiply
    28,212.82x = 42,319.70 × 13,418.76
  4. Step 4: Simplify right side
    28,212.82x = 567,877,897.57
  5. Step 5: Solve for x
    x = 567,877,897.57/28,212.82
  6. Step 6: Final answer
    x = 20,128.36

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1.5x scale

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.