Home / 13,029.80-17,981.15-7,651.20

Finding the Fourth Proportional to 13,029.80, 17,981.15 and 7,651.20

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Solution

The fourth proportional to 13,029.80, 17,981.15 and 7,651.20 is: 10,558.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,029.80 : 17,981.15 = 7,651.20 : x
  2. Step 2: Convert to fraction form
    13,029.80/17,981.15 = 7,651.20/x
  3. Step 3: Cross multiply
    13,029.80x = 17,981.15 × 7,651.20
  4. Step 4: Simplify right side
    13,029.80x = 137,577,374.88
  5. Step 5: Solve for x
    x = 137,577,374.88/13,029.80
  6. Step 6: Final answer
    x = 10,558.67

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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.