Home / 21,705.60-29,959.20-12,277.20

Finding the Fourth Proportional to 21,705.60, 29,959.20 and 12,277.20

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Solution

The fourth proportional to 21,705.60, 29,959.20 and 12,277.20 is: 16,945.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,705.60 : 29,959.20 = 12,277.20 : x
  2. Step 2: Convert to fraction form
    21,705.60/29,959.20 = 12,277.20/x
  3. Step 3: Cross multiply
    21,705.60x = 29,959.20 × 12,277.20
  4. Step 4: Simplify right side
    21,705.60x = 367,815,090.24
  5. Step 5: Solve for x
    x = 367,815,090.24/21,705.60
  6. Step 6: Final answer
    x = 16,945.63

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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.