Home / 20,832.40-28,748.76-11,400.92

Finding the Fourth Proportional to 20,832.40, 28,748.76 and 11,400.92

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Solution

The fourth proportional to 20,832.40, 28,748.76 and 11,400.92 is: 15,733.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,832.40 : 28,748.76 = 11,400.92 : x
  2. Step 2: Convert to fraction form
    20,832.40/28,748.76 = 11,400.92/x
  3. Step 3: Cross multiply
    20,832.40x = 28,748.76 × 11,400.92
  4. Step 4: Simplify right side
    20,832.40x = 327,762,312.86
  5. Step 5: Solve for x
    x = 327,762,312.86/20,832.40
  6. Step 6: Final answer
    x = 15,733.30

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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.