Home / 20,622.72-28,437.84-12,237.60

Finding the Fourth Proportional to 20,622.72, 28,437.84 and 12,237.60

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Solution

The fourth proportional to 20,622.72, 28,437.84 and 12,237.60 is: 16,875.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.72 : 28,437.84 = 12,237.60 : x
  2. Step 2: Convert to fraction form
    20,622.72/28,437.84 = 12,237.60/x
  3. Step 3: Cross multiply
    20,622.72x = 28,437.84 × 12,237.60
  4. Step 4: Simplify right side
    20,622.72x = 348,010,910.78
  5. Step 5: Solve for x
    x = 348,010,910.78/20,622.72
  6. Step 6: Final answer
    x = 16,875.12

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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.