Home / 15,080.84-20,812.38-9,780.20

Finding the Fourth Proportional to 15,080.84, 20,812.38 and 9,780.20

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Solution

The fourth proportional to 15,080.84, 20,812.38 and 9,780.20 is: 13,497.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,080.84 : 20,812.38 = 9,780.20 : x
  2. Step 2: Convert to fraction form
    15,080.84/20,812.38 = 9,780.20/x
  3. Step 3: Cross multiply
    15,080.84x = 20,812.38 × 9,780.20
  4. Step 4: Simplify right side
    15,080.84x = 203,549,238.88
  5. Step 5: Solve for x
    x = 203,549,238.88/15,080.84
  6. Step 6: Final answer
    x = 13,497.21

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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.