Home / 21,875.64-30,180.62-12,921.24

Finding the Fourth Proportional to 21,875.64, 30,180.62 and 12,921.24

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Solution

The fourth proportional to 21,875.64, 30,180.62 and 12,921.24 is: 17,826.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,875.64 : 30,180.62 = 12,921.24 : x
  2. Step 2: Convert to fraction form
    21,875.64/30,180.62 = 12,921.24/x
  3. Step 3: Cross multiply
    21,875.64x = 30,180.62 × 12,921.24
  4. Step 4: Simplify right side
    21,875.64x = 389,971,034.37
  5. Step 5: Solve for x
    x = 389,971,034.37/21,875.64
  6. Step 6: Final answer
    x = 17,826.73

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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.