Home / 15,089.56-20,820.45-9,120.07

Finding the Fourth Proportional to 15,089.56, 20,820.45 and 9,120.07

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Solution

The fourth proportional to 15,089.56, 20,820.45 and 9,120.07 is: 12,583.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,089.56 : 20,820.45 = 9,120.07 : x
  2. Step 2: Convert to fraction form
    15,089.56/20,820.45 = 9,120.07/x
  3. Step 3: Cross multiply
    15,089.56x = 20,820.45 × 9,120.07
  4. Step 4: Simplify right side
    15,089.56x = 189,883,961.43
  5. Step 5: Solve for x
    x = 189,883,961.43/15,089.56
  6. Step 6: Final answer
    x = 12,583.80

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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.