Home / 20,328.60-28,051.20-11,374.86

Finding the Fourth Proportional to 20,328.60, 28,051.20 and 11,374.86

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Solution

The fourth proportional to 20,328.60, 28,051.20 and 11,374.86 is: 15,696.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,328.60 : 28,051.20 = 11,374.86 : x
  2. Step 2: Convert to fraction form
    20,328.60/28,051.20 = 11,374.86/x
  3. Step 3: Cross multiply
    20,328.60x = 28,051.20 × 11,374.86
  4. Step 4: Simplify right side
    20,328.60x = 319,078,472.83
  5. Step 5: Solve for x
    x = 319,078,472.83/20,328.60
  6. Step 6: Final answer
    x = 15,696.04

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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.