Home / 20,455.61-28,230.87-12,503.12

Finding the Fourth Proportional to 20,455.61, 28,230.87 and 12,503.12

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Solution

The fourth proportional to 20,455.61, 28,230.87 and 12,503.12 is: 17,255.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.61 : 28,230.87 = 12,503.12 : x
  2. Step 2: Convert to fraction form
    20,455.61/28,230.87 = 12,503.12/x
  3. Step 3: Cross multiply
    20,455.61x = 28,230.87 × 12,503.12
  4. Step 4: Simplify right side
    20,455.61x = 352,973,814.16
  5. Step 5: Solve for x
    x = 352,973,814.16/20,455.61
  6. Step 6: Final answer
    x = 17,255.60

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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.