Home / 21,867.88-30,177.03-12,308.32

Finding the Fourth Proportional to 21,867.88, 30,177.03 and 12,308.32

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Solution

The fourth proportional to 21,867.88, 30,177.03 and 12,308.32 is: 16,985.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,867.88 : 30,177.03 = 12,308.32 : x
  2. Step 2: Convert to fraction form
    21,867.88/30,177.03 = 12,308.32/x
  3. Step 3: Cross multiply
    21,867.88x = 30,177.03 × 12,308.32
  4. Step 4: Simplify right side
    21,867.88x = 371,428,541.89
  5. Step 5: Solve for x
    x = 371,428,541.89/21,867.88
  6. Step 6: Final answer
    x = 16,985.12

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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.