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Finding the Fourth Proportional to 19,075.72, 28,599.72 and 7,985.64

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Solution

The fourth proportional to 19,075.72, 28,599.72 and 7,985.64 is: 11,972.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,075.72 : 28,599.72 = 7,985.64 : x
  2. Step 2: Convert to fraction form
    19,075.72/28,599.72 = 7,985.64/x
  3. Step 3: Cross multiply
    19,075.72x = 28,599.72 × 7,985.64
  4. Step 4: Simplify right side
    19,075.72x = 228,387,068.02
  5. Step 5: Solve for x
    x = 228,387,068.02/19,075.72
  6. Step 6: Final answer
    x = 11,972.66

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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.