Home / 28,550.25-42,840.72-11,921.67

Finding the Fourth Proportional to 28,550.25, 42,840.72 and 11,921.67

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Solution

The fourth proportional to 28,550.25, 42,840.72 and 11,921.67 is: 17,888.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,550.25 : 42,840.72 = 11,921.67 : x
  2. Step 2: Convert to fraction form
    28,550.25/42,840.72 = 11,921.67/x
  3. Step 3: Cross multiply
    28,550.25x = 42,840.72 × 11,921.67
  4. Step 4: Simplify right side
    28,550.25x = 510,732,926.40
  5. Step 5: Solve for x
    x = 510,732,926.40/28,550.25
  6. Step 6: Final answer
    x = 17,888.91

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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.