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Finding the Fourth Proportional to 19,989, 30,017.52 and 19,153.08

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Solution

The fourth proportional to 19,989, 30,017.52 and 19,153.08 is: 28,762.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,989 : 30,017.52 = 19,153.08 : x
  2. Step 2: Convert to fraction form
    19,989/30,017.52 = 19,153.08/x
  3. Step 3: Cross multiply
    19,989x = 30,017.52 × 19,153.08
  4. Step 4: Simplify right side
    19,989x = 574,927,961.96
  5. Step 5: Solve for x
    x = 574,927,961.96/19,989
  6. Step 6: Final answer
    x = 28,762.22

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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.