Home / 15,528.12-21,427.72-8,813.89

Finding the Fourth Proportional to 15,528.12, 21,427.72 and 8,813.89

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Solution

The fourth proportional to 15,528.12, 21,427.72 and 8,813.89 is: 12,162.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.12 : 21,427.72 = 8,813.89 : x
  2. Step 2: Convert to fraction form
    15,528.12/21,427.72 = 8,813.89/x
  3. Step 3: Cross multiply
    15,528.12x = 21,427.72 × 8,813.89
  4. Step 4: Simplify right side
    15,528.12x = 188,861,415.82
  5. Step 5: Solve for x
    x = 188,861,415.82/15,528.12
  6. Step 6: Final answer
    x = 12,162.54

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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.