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Finding the Fourth Proportional to 19,390.56, 29,079.72 and 6,240

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Solution

The fourth proportional to 19,390.56, 29,079.72 and 6,240 is: 9,358.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,390.56 : 29,079.72 = 6,240 : x
  2. Step 2: Convert to fraction form
    19,390.56/29,079.72 = 6,240/x
  3. Step 3: Cross multiply
    19,390.56x = 29,079.72 × 6,240
  4. Step 4: Simplify right side
    19,390.56x = 181,457,452.80
  5. Step 5: Solve for x
    x = 181,457,452.80/19,390.56
  6. Step 6: Final answer
    x = 9,358.03

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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.