Home / 28,221.70-42,343.35-12,628.12

Finding the Fourth Proportional to 28,221.70, 42,343.35 and 12,628.12

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Solution

The fourth proportional to 28,221.70, 42,343.35 and 12,628.12 is: 18,947.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,221.70 : 42,343.35 = 12,628.12 : x
  2. Step 2: Convert to fraction form
    28,221.70/42,343.35 = 12,628.12/x
  3. Step 3: Cross multiply
    28,221.70x = 42,343.35 × 12,628.12
  4. Step 4: Simplify right side
    28,221.70x = 534,716,905.00
  5. Step 5: Solve for x
    x = 534,716,905.00/28,221.70
  6. Step 6: Final answer
    x = 18,947.01

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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.