Home / 20,706.48-28,575.12-11,275.05

Finding the Fourth Proportional to 20,706.48, 28,575.12 and 11,275.05

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Solution

The fourth proportional to 20,706.48, 28,575.12 and 11,275.05 is: 15,559.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706.48 : 28,575.12 = 11,275.05 : x
  2. Step 2: Convert to fraction form
    20,706.48/28,575.12 = 11,275.05/x
  3. Step 3: Cross multiply
    20,706.48x = 28,575.12 × 11,275.05
  4. Step 4: Simplify right side
    20,706.48x = 322,185,906.76
  5. Step 5: Solve for x
    x = 322,185,906.76/20,706.48
  6. Step 6: Final answer
    x = 15,559.67

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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.