Home / 13,245.18-19,870.70-4,479.90

Finding the Fourth Proportional to 13,245.18, 19,870.70 and 4,479.90

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Solution

The fourth proportional to 13,245.18, 19,870.70 and 4,479.90 is: 6,720.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,245.18 : 19,870.70 = 4,479.90 : x
  2. Step 2: Convert to fraction form
    13,245.18/19,870.70 = 4,479.90/x
  3. Step 3: Cross multiply
    13,245.18x = 19,870.70 × 4,479.90
  4. Step 4: Simplify right side
    13,245.18x = 89,018,726.53
  5. Step 5: Solve for x
    x = 89,018,726.53/13,245.18
  6. Step 6: Final answer
    x = 6,720.84

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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.