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Finding the Fourth Proportional to 12,860.98, 17,748.39 and 7,271.98

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Solution

The fourth proportional to 12,860.98, 17,748.39 and 7,271.98 is: 10,035.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,860.98 : 17,748.39 = 7,271.98 : x
  2. Step 2: Convert to fraction form
    12,860.98/17,748.39 = 7,271.98/x
  3. Step 3: Cross multiply
    12,860.98x = 17,748.39 × 7,271.98
  4. Step 4: Simplify right side
    12,860.98x = 129,065,937.11
  5. Step 5: Solve for x
    x = 129,065,937.11/12,860.98
  6. Step 6: Final answer
    x = 10,035.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.