Home / 20,658.72-28,509.12-12,275.04

Finding the Fourth Proportional to 20,658.72, 28,509.12 and 12,275.04

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Solution

The fourth proportional to 20,658.72, 28,509.12 and 12,275.04 is: 16,939.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.72 : 28,509.12 = 12,275.04 : x
  2. Step 2: Convert to fraction form
    20,658.72/28,509.12 = 12,275.04/x
  3. Step 3: Cross multiply
    20,658.72x = 28,509.12 × 12,275.04
  4. Step 4: Simplify right side
    20,658.72x = 349,950,588.36
  5. Step 5: Solve for x
    x = 349,950,588.36/20,658.72
  6. Step 6: Final answer
    x = 16,939.61

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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.