Home / 19,719.14-29,561.43-7,415.78

Finding the Fourth Proportional to 19,719.14, 29,561.43 and 7,415.78

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Solution

The fourth proportional to 19,719.14, 29,561.43 and 7,415.78 is: 11,117.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,719.14 : 29,561.43 = 7,415.78 : x
  2. Step 2: Convert to fraction form
    19,719.14/29,561.43 = 7,415.78/x
  3. Step 3: Cross multiply
    19,719.14x = 29,561.43 × 7,415.78
  4. Step 4: Simplify right side
    19,719.14x = 219,221,061.37
  5. Step 5: Solve for x
    x = 219,221,061.37/19,719.14
  6. Step 6: Final answer
    x = 11,117.17

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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.