Home / 21,433.12-29,577.78-12,486.76

Finding the Fourth Proportional to 21,433.12, 29,577.78 and 12,486.76

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Solution

The fourth proportional to 21,433.12, 29,577.78 and 12,486.76 is: 17,231.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,433.12 : 29,577.78 = 12,486.76 : x
  2. Step 2: Convert to fraction form
    21,433.12/29,577.78 = 12,486.76/x
  3. Step 3: Cross multiply
    21,433.12x = 29,577.78 × 12,486.76
  4. Step 4: Simplify right side
    21,433.12x = 369,330,640.19
  5. Step 5: Solve for x
    x = 369,330,640.19/21,433.12
  6. Step 6: Final answer
    x = 17,231.77

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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.