Home / 15,918.86-21,894.99-12,768.14

Finding the Fourth Proportional to 15,918.86, 21,894.99 and 12,768.14

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Solution

The fourth proportional to 15,918.86, 21,894.99 and 12,768.14 is: 17,561.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,918.86 : 21,894.99 = 12,768.14 : x
  2. Step 2: Convert to fraction form
    15,918.86/21,894.99 = 12,768.14/x
  3. Step 3: Cross multiply
    15,918.86x = 21,894.99 × 12,768.14
  4. Step 4: Simplify right side
    15,918.86x = 279,558,297.62
  5. Step 5: Solve for x
    x = 279,558,297.62/15,918.86
  6. Step 6: Final answer
    x = 17,561.45

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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.