Home / 19,780.36-29,670.82-6,453.28

Finding the Fourth Proportional to 19,780.36, 29,670.82 and 6,453.28

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Solution

The fourth proportional to 19,780.36, 29,670.82 and 6,453.28 is: 9,680.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,780.36 : 29,670.82 = 6,453.28 : x
  2. Step 2: Convert to fraction form
    19,780.36/29,670.82 = 6,453.28/x
  3. Step 3: Cross multiply
    19,780.36x = 29,670.82 × 6,453.28
  4. Step 4: Simplify right side
    19,780.36x = 191,474,109.29
  5. Step 5: Solve for x
    x = 191,474,109.29/19,780.36
  6. Step 6: Final answer
    x = 9,680.01

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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.