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Finding the Fourth Proportional to 19,036.80, 28,560 and 15,372.32

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Solution

The fourth proportional to 19,036.80, 28,560 and 15,372.32 is: 23,062.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,036.80 : 28,560 = 15,372.32 : x
  2. Step 2: Convert to fraction form
    19,036.80/28,560 = 15,372.32/x
  3. Step 3: Cross multiply
    19,036.80x = 28,560 × 15,372.32
  4. Step 4: Simplify right side
    19,036.80x = 439,033,459.20
  5. Step 5: Solve for x
    x = 439,033,459.20/19,036.80
  6. Step 6: Final answer
    x = 23,062.36

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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.