Home / 20,973.12-28,974.72-15,658.74

Finding the Fourth Proportional to 20,973.12, 28,974.72 and 15,658.74

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Solution

The fourth proportional to 20,973.12, 28,974.72 and 15,658.74 is: 21,632.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,973.12 : 28,974.72 = 15,658.74 : x
  2. Step 2: Convert to fraction form
    20,973.12/28,974.72 = 15,658.74/x
  3. Step 3: Cross multiply
    20,973.12x = 28,974.72 × 15,658.74
  4. Step 4: Simplify right side
    20,973.12x = 453,707,607.05
  5. Step 5: Solve for x
    x = 453,707,607.05/20,973.12
  6. Step 6: Final answer
    x = 21,632.81

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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.