Home / 15,528.93-21,428.84-8,814.70

Finding the Fourth Proportional to 15,528.93, 21,428.84 and 8,814.70

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Solution

The fourth proportional to 15,528.93, 21,428.84 and 8,814.70 is: 12,163.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,528.93 : 21,428.84 = 8,814.70 : x
  2. Step 2: Convert to fraction form
    15,528.93/21,428.84 = 8,814.70/x
  3. Step 3: Cross multiply
    15,528.93x = 21,428.84 × 8,814.70
  4. Step 4: Simplify right side
    15,528.93x = 188,888,795.95
  5. Step 5: Solve for x
    x = 188,888,795.95/15,528.93
  6. Step 6: Final answer
    x = 12,163.67

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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.