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Finding the Fourth Proportional to 19,114.71, 28,649.99 and 7,418.01

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Solution

The fourth proportional to 19,114.71, 28,649.99 and 7,418.01 is: 11,118.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,114.71 : 28,649.99 = 7,418.01 : x
  2. Step 2: Convert to fraction form
    19,114.71/28,649.99 = 7,418.01/x
  3. Step 3: Cross multiply
    19,114.71x = 28,649.99 × 7,418.01
  4. Step 4: Simplify right side
    19,114.71x = 212,525,875.23
  5. Step 5: Solve for x
    x = 212,525,875.23/19,114.71
  6. Step 6: Final answer
    x = 11,118.45

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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.