Home / 42,561.90-63,853.20-12,980.34

Finding the Fourth Proportional to 42,561.90, 63,853.20 and 12,980.34

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Solution

The fourth proportional to 42,561.90, 63,853.20 and 12,980.34 is: 19,473.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,561.90 : 63,853.20 = 12,980.34 : x
  2. Step 2: Convert to fraction form
    42,561.90/63,853.20 = 12,980.34/x
  3. Step 3: Cross multiply
    42,561.90x = 63,853.20 × 12,980.34
  4. Step 4: Simplify right side
    42,561.90x = 828,836,246.09
  5. Step 5: Solve for x
    x = 828,836,246.09/42,561.90
  6. Step 6: Final answer
    x = 19,473.67

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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.