Home / 20,700.24-31,065.40-15,520.08

Finding the Fourth Proportional to 20,700.24, 31,065.40 and 15,520.08

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Solution

The fourth proportional to 20,700.24, 31,065.40 and 15,520.08 is: 23,291.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,700.24 : 31,065.40 = 15,520.08 : x
  2. Step 2: Convert to fraction form
    20,700.24/31,065.40 = 15,520.08/x
  3. Step 3: Cross multiply
    20,700.24x = 31,065.40 × 15,520.08
  4. Step 4: Simplify right side
    20,700.24x = 482,137,493.23
  5. Step 5: Solve for x
    x = 482,137,493.23/20,700.24
  6. Step 6: Final answer
    x = 23,291.40

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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.