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Finding the Fourth Proportional to 12,958.90, 19,406.76 and 7,395.43

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Solution

The fourth proportional to 12,958.90, 19,406.76 and 7,395.43 is: 11,075.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,958.90 : 19,406.76 = 7,395.43 : x
  2. Step 2: Convert to fraction form
    12,958.90/19,406.76 = 7,395.43/x
  3. Step 3: Cross multiply
    12,958.90x = 19,406.76 × 7,395.43
  4. Step 4: Simplify right side
    12,958.90x = 143,521,335.11
  5. Step 5: Solve for x
    x = 143,521,335.11/12,958.90
  6. Step 6: Final answer
    x = 11,075.12

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1.5x scale

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.