Home / 21,015.96-28,993.86-12,060.20

Finding the Fourth Proportional to 21,015.96, 28,993.86 and 12,060.20

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Solution

The fourth proportional to 21,015.96, 28,993.86 and 12,060.20 is: 16,638.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.96 : 28,993.86 = 12,060.20 : x
  2. Step 2: Convert to fraction form
    21,015.96/28,993.86 = 12,060.20/x
  3. Step 3: Cross multiply
    21,015.96x = 28,993.86 × 12,060.20
  4. Step 4: Simplify right side
    21,015.96x = 349,671,750.37
  5. Step 5: Solve for x
    x = 349,671,750.37/21,015.96
  6. Step 6: Final answer
    x = 16,638.39

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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.