Home / 15,145.58-20,900.29-8,431.02

Finding the Fourth Proportional to 15,145.58, 20,900.29 and 8,431.02

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Solution

The fourth proportional to 15,145.58, 20,900.29 and 8,431.02 is: 11,634.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,145.58 : 20,900.29 = 8,431.02 : x
  2. Step 2: Convert to fraction form
    15,145.58/20,900.29 = 8,431.02/x
  3. Step 3: Cross multiply
    15,145.58x = 20,900.29 × 8,431.02
  4. Step 4: Simplify right side
    15,145.58x = 176,210,763.00
  5. Step 5: Solve for x
    x = 176,210,763.00/15,145.58
  6. Step 6: Final answer
    x = 11,634.47

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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.