Home / 20,480.12-30,670.95-11,688.38

Finding the Fourth Proportional to 20,480.12, 30,670.95 and 11,688.38

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Solution

The fourth proportional to 20,480.12, 30,670.95 and 11,688.38 is: 17,504.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.12 : 30,670.95 = 11,688.38 : x
  2. Step 2: Convert to fraction form
    20,480.12/30,670.95 = 11,688.38/x
  3. Step 3: Cross multiply
    20,480.12x = 30,670.95 × 11,688.38
  4. Step 4: Simplify right side
    20,480.12x = 358,493,718.56
  5. Step 5: Solve for x
    x = 358,493,718.56/20,480.12
  6. Step 6: Final answer
    x = 17,504.47

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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.