Home / 20,950.10-28,908.12-12,331.16

Finding the Fourth Proportional to 20,950.10, 28,908.12 and 12,331.16

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Solution

The fourth proportional to 20,950.10, 28,908.12 and 12,331.16 is: 17,015.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.10 : 28,908.12 = 12,331.16 : x
  2. Step 2: Convert to fraction form
    20,950.10/28,908.12 = 12,331.16/x
  3. Step 3: Cross multiply
    20,950.10x = 28,908.12 × 12,331.16
  4. Step 4: Simplify right side
    20,950.10x = 356,470,653.02
  5. Step 5: Solve for x
    x = 356,470,653.02/20,950.10
  6. Step 6: Final answer
    x = 17,015.22

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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.