Home / 21,231.86-29,291.52-12,277.70

Finding the Fourth Proportional to 21,231.86, 29,291.52 and 12,277.70

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Solution

The fourth proportional to 21,231.86, 29,291.52 and 12,277.70 is: 16,938.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,231.86 : 29,291.52 = 12,277.70 : x
  2. Step 2: Convert to fraction form
    21,231.86/29,291.52 = 12,277.70/x
  3. Step 3: Cross multiply
    21,231.86x = 29,291.52 × 12,277.70
  4. Step 4: Simplify right side
    21,231.86x = 359,632,495.10
  5. Step 5: Solve for x
    x = 359,632,495.10/21,231.86
  6. Step 6: Final answer
    x = 16,938.34

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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.