Home / 30,720.78-46,081.14-9,660.72

Finding the Fourth Proportional to 30,720.78, 46,081.14 and 9,660.72

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Solution

The fourth proportional to 30,720.78, 46,081.14 and 9,660.72 is: 14,491.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,720.78 : 46,081.14 = 9,660.72 : x
  2. Step 2: Convert to fraction form
    30,720.78/46,081.14 = 9,660.72/x
  3. Step 3: Cross multiply
    30,720.78x = 46,081.14 × 9,660.72
  4. Step 4: Simplify right side
    30,720.78x = 445,176,990.82
  5. Step 5: Solve for x
    x = 445,176,990.82/30,720.78
  6. Step 6: Final answer
    x = 14,491.07

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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.