Home / 13,920.32-19,210.10-8,331.32

Finding the Fourth Proportional to 13,920.32, 19,210.10 and 8,331.32

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Solution

The fourth proportional to 13,920.32, 19,210.10 and 8,331.32 is: 11,497.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.32 : 19,210.10 = 8,331.32 : x
  2. Step 2: Convert to fraction form
    13,920.32/19,210.10 = 8,331.32/x
  3. Step 3: Cross multiply
    13,920.32x = 19,210.10 × 8,331.32
  4. Step 4: Simplify right side
    13,920.32x = 160,045,490.33
  5. Step 5: Solve for x
    x = 160,045,490.33/13,920.32
  6. Step 6: Final answer
    x = 11,497.26

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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.