Home / 19,987.20-29,980.80-6,839.67

Finding the Fourth Proportional to 19,987.20, 29,980.80 and 6,839.67

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Solution

The fourth proportional to 19,987.20, 29,980.80 and 6,839.67 is: 10,259.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.20 : 29,980.80 = 6,839.67 : x
  2. Step 2: Convert to fraction form
    19,987.20/29,980.80 = 6,839.67/x
  3. Step 3: Cross multiply
    19,987.20x = 29,980.80 × 6,839.67
  4. Step 4: Simplify right side
    19,987.20x = 205,058,778.34
  5. Step 5: Solve for x
    x = 205,058,778.34/19,987.20
  6. Step 6: Final answer
    x = 10,259.51

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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.