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Finding the Fourth Proportional to 20,503.93, 30,755.88 and 15,830.74

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Solution

The fourth proportional to 20,503.93, 30,755.88 and 15,830.74 is: 23,746.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,503.93 : 30,755.88 = 15,830.74 : x
  2. Step 2: Convert to fraction form
    20,503.93/30,755.88 = 15,830.74/x
  3. Step 3: Cross multiply
    20,503.93x = 30,755.88 × 15,830.74
  4. Step 4: Simplify right side
    20,503.93x = 486,888,339.75
  5. Step 5: Solve for x
    x = 486,888,339.75/20,503.93
  6. Step 6: Final answer
    x = 23,746.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.