Home / 21,989.96-30,346.48-12,558.54

Finding the Fourth Proportional to 21,989.96, 30,346.48 and 12,558.54

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Solution

The fourth proportional to 21,989.96, 30,346.48 and 12,558.54 is: 17,330.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.96 : 30,346.48 = 12,558.54 : x
  2. Step 2: Convert to fraction form
    21,989.96/30,346.48 = 12,558.54/x
  3. Step 3: Cross multiply
    21,989.96x = 30,346.48 × 12,558.54
  4. Step 4: Simplify right side
    21,989.96x = 381,107,482.94
  5. Step 5: Solve for x
    x = 381,107,482.94/21,989.96
  6. Step 6: Final answer
    x = 17,330.98

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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.