Home / 20,573.76-28,391.73-11,142.30

Finding the Fourth Proportional to 20,573.76, 28,391.73 and 11,142.30

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Solution

The fourth proportional to 20,573.76, 28,391.73 and 11,142.30 is: 15,376.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,573.76 : 28,391.73 = 11,142.30 : x
  2. Step 2: Convert to fraction form
    20,573.76/28,391.73 = 11,142.30/x
  3. Step 3: Cross multiply
    20,573.76x = 28,391.73 × 11,142.30
  4. Step 4: Simplify right side
    20,573.76x = 316,349,173.18
  5. Step 5: Solve for x
    x = 316,349,173.18/20,573.76
  6. Step 6: Final answer
    x = 15,376.34

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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.