Home / 13,245.76-19,840.20-12,470.32

Finding the Fourth Proportional to 13,245.76, 19,840.20 and 12,470.32

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Solution

The fourth proportional to 13,245.76, 19,840.20 and 12,470.32 is: 18,678.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,245.76 : 19,840.20 = 12,470.32 : x
  2. Step 2: Convert to fraction form
    13,245.76/19,840.20 = 12,470.32/x
  3. Step 3: Cross multiply
    13,245.76x = 19,840.20 × 12,470.32
  4. Step 4: Simplify right side
    13,245.76x = 247,413,642.86
  5. Step 5: Solve for x
    x = 247,413,642.86/13,245.76
  6. Step 6: Final answer
    x = 18,678.70

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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.