Home / 20,810.30-28,717.76-11,378.86

Finding the Fourth Proportional to 20,810.30, 28,717.76 and 11,378.86

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Solution

The fourth proportional to 20,810.30, 28,717.76 and 11,378.86 is: 15,702.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,810.30 : 28,717.76 = 11,378.86 : x
  2. Step 2: Convert to fraction form
    20,810.30/28,717.76 = 11,378.86/x
  3. Step 3: Cross multiply
    20,810.30x = 28,717.76 × 11,378.86
  4. Step 4: Simplify right side
    20,810.30x = 326,775,327.21
  5. Step 5: Solve for x
    x = 326,775,327.21/20,810.30
  6. Step 6: Final answer
    x = 15,702.58

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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.