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Finding the Fourth Proportional to 15,756.21, 23,631.01 and 6,985.53

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Solution

The fourth proportional to 15,756.21, 23,631.01 and 6,985.53 is: 10,476.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,756.21 : 23,631.01 = 6,985.53 : x
  2. Step 2: Convert to fraction form
    15,756.21/23,631.01 = 6,985.53/x
  3. Step 3: Cross multiply
    15,756.21x = 23,631.01 × 6,985.53
  4. Step 4: Simplify right side
    15,756.21x = 165,075,111.82
  5. Step 5: Solve for x
    x = 165,075,111.82/15,756.21
  6. Step 6: Final answer
    x = 10,476.83

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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.