Home / 21,857.58-30,166.02-12,427.56

Finding the Fourth Proportional to 21,857.58, 30,166.02 and 12,427.56

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Solution

The fourth proportional to 21,857.58, 30,166.02 and 12,427.56 is: 17,151.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,857.58 : 30,166.02 = 12,427.56 : x
  2. Step 2: Convert to fraction form
    21,857.58/30,166.02 = 12,427.56/x
  3. Step 3: Cross multiply
    21,857.58x = 30,166.02 × 12,427.56
  4. Step 4: Simplify right side
    21,857.58x = 374,890,023.51
  5. Step 5: Solve for x
    x = 374,890,023.51/21,857.58
  6. Step 6: Final answer
    x = 17,151.49

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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.