Home / 28,009.85-42,022.20-12,208.10

Finding the Fourth Proportional to 28,009.85, 42,022.20 and 12,208.10

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Solution

The fourth proportional to 28,009.85, 42,022.20 and 12,208.10 is: 18,315.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,009.85 : 42,022.20 = 12,208.10 : x
  2. Step 2: Convert to fraction form
    28,009.85/42,022.20 = 12,208.10/x
  3. Step 3: Cross multiply
    28,009.85x = 42,022.20 × 12,208.10
  4. Step 4: Simplify right side
    28,009.85x = 513,011,219.82
  5. Step 5: Solve for x
    x = 513,011,219.82/28,009.85
  6. Step 6: Final answer
    x = 18,315.39

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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.