Home / 20,420.15-28,182.85-12,466.98

Finding the Fourth Proportional to 20,420.15, 28,182.85 and 12,466.98

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Solution

The fourth proportional to 20,420.15, 28,182.85 and 12,466.98 is: 17,206.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.15 : 28,182.85 = 12,466.98 : x
  2. Step 2: Convert to fraction form
    20,420.15/28,182.85 = 12,466.98/x
  3. Step 3: Cross multiply
    20,420.15x = 28,182.85 × 12,466.98
  4. Step 4: Simplify right side
    20,420.15x = 351,354,996.13
  5. Step 5: Solve for x
    x = 351,354,996.13/20,420.15
  6. Step 6: Final answer
    x = 17,206.29

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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.