Home / 15,338.88-21,154.64-12,960.52

Finding the Fourth Proportional to 15,338.88, 21,154.64 and 12,960.52

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Solution

The fourth proportional to 15,338.88, 21,154.64 and 12,960.52 is: 17,874.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,338.88 : 21,154.64 = 12,960.52 : x
  2. Step 2: Convert to fraction form
    15,338.88/21,154.64 = 12,960.52/x
  3. Step 3: Cross multiply
    15,338.88x = 21,154.64 × 12,960.52
  4. Step 4: Simplify right side
    15,338.88x = 274,175,134.81
  5. Step 5: Solve for x
    x = 274,175,134.81/15,338.88
  6. Step 6: Final answer
    x = 17,874.52

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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.