Home / 20,833.77-28,749.50-11,400.51

Finding the Fourth Proportional to 20,833.77, 28,749.50 and 11,400.51

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Solution

The fourth proportional to 20,833.77, 28,749.50 and 11,400.51 is: 15,732.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,833.77 : 28,749.50 = 11,400.51 : x
  2. Step 2: Convert to fraction form
    20,833.77/28,749.50 = 11,400.51/x
  3. Step 3: Cross multiply
    20,833.77x = 28,749.50 × 11,400.51
  4. Step 4: Simplify right side
    20,833.77x = 327,758,905.24
  5. Step 5: Solve for x
    x = 327,758,905.24/20,833.77
  6. Step 6: Final answer
    x = 15,732.10

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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.