Home / 21,867.94-30,177.48-12,307.78

Finding the Fourth Proportional to 21,867.94, 30,177.48 and 12,307.78

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Solution

The fourth proportional to 21,867.94, 30,177.48 and 12,307.78 is: 16,984.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,867.94 : 30,177.48 = 12,307.78 : x
  2. Step 2: Convert to fraction form
    21,867.94/30,177.48 = 12,307.78/x
  3. Step 3: Cross multiply
    21,867.94x = 30,177.48 × 12,307.78
  4. Step 4: Simplify right side
    21,867.94x = 371,417,784.79
  5. Step 5: Solve for x
    x = 371,417,784.79/21,867.94
  6. Step 6: Final answer
    x = 16,984.58

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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.