Home / 21,826.40-30,124.08-12,876.12

Finding the Fourth Proportional to 21,826.40, 30,124.08 and 12,876.12

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Solution

The fourth proportional to 21,826.40, 30,124.08 and 12,876.12 is: 17,771.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,826.40 : 30,124.08 = 12,876.12 : x
  2. Step 2: Convert to fraction form
    21,826.40/30,124.08 = 12,876.12/x
  3. Step 3: Cross multiply
    21,826.40x = 30,124.08 × 12,876.12
  4. Step 4: Simplify right side
    21,826.40x = 387,881,268.97
  5. Step 5: Solve for x
    x = 387,881,268.97/21,826.40
  6. Step 6: Final answer
    x = 17,771.20

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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.