Home / 12,931.39-17,846.21-8,689.56

Finding the Fourth Proportional to 12,931.39, 17,846.21 and 8,689.56

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Solution

The fourth proportional to 12,931.39, 17,846.21 and 8,689.56 is: 11,992.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931.39 : 17,846.21 = 8,689.56 : x
  2. Step 2: Convert to fraction form
    12,931.39/17,846.21 = 8,689.56/x
  3. Step 3: Cross multiply
    12,931.39x = 17,846.21 × 8,689.56
  4. Step 4: Simplify right side
    12,931.39x = 155,075,712.57
  5. Step 5: Solve for x
    x = 155,075,712.57/12,931.39
  6. Step 6: Final answer
    x = 11,992.19

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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.