Home / 21,215.16-29,277.85-11,783.72

Finding the Fourth Proportional to 21,215.16, 29,277.85 and 11,783.72

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Solution

The fourth proportional to 21,215.16, 29,277.85 and 11,783.72 is: 16,262.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.16 : 29,277.85 = 11,783.72 : x
  2. Step 2: Convert to fraction form
    21,215.16/29,277.85 = 11,783.72/x
  3. Step 3: Cross multiply
    21,215.16x = 29,277.85 × 11,783.72
  4. Step 4: Simplify right side
    21,215.16x = 345,002,030.34
  5. Step 5: Solve for x
    x = 345,002,030.34/21,215.16
  6. Step 6: Final answer
    x = 16,262.05

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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.