Home / 19,790.48-29,686.20-6,643.28

Finding the Fourth Proportional to 19,790.48, 29,686.20 and 6,643.28

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Solution

The fourth proportional to 19,790.48, 29,686.20 and 6,643.28 is: 9,965.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,790.48 : 29,686.20 = 6,643.28 : x
  2. Step 2: Convert to fraction form
    19,790.48/29,686.20 = 6,643.28/x
  3. Step 3: Cross multiply
    19,790.48x = 29,686.20 × 6,643.28
  4. Step 4: Simplify right side
    19,790.48x = 197,213,738.74
  5. Step 5: Solve for x
    x = 197,213,738.74/19,790.48
  6. Step 6: Final answer
    x = 9,965.08

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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.