Home / 21,750.78-30,014.91-12,319.14

Finding the Fourth Proportional to 21,750.78, 30,014.91 and 12,319.14

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Solution

The fourth proportional to 21,750.78, 30,014.91 and 12,319.14 is: 16,999.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,750.78 : 30,014.91 = 12,319.14 : x
  2. Step 2: Convert to fraction form
    21,750.78/30,014.91 = 12,319.14/x
  3. Step 3: Cross multiply
    21,750.78x = 30,014.91 × 12,319.14
  4. Step 4: Simplify right side
    21,750.78x = 369,757,878.38
  5. Step 5: Solve for x
    x = 369,757,878.38/21,750.78
  6. Step 6: Final answer
    x = 16,999.75

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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.