Home / 20,658.61-28,508.88-12,160.99

Finding the Fourth Proportional to 20,658.61, 28,508.88 and 12,160.99

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Solution

The fourth proportional to 20,658.61, 28,508.88 and 12,160.99 is: 16,782.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,658.61 : 28,508.88 = 12,160.99 : x
  2. Step 2: Convert to fraction form
    20,658.61/28,508.88 = 12,160.99/x
  3. Step 3: Cross multiply
    20,658.61x = 28,508.88 × 12,160.99
  4. Step 4: Simplify right side
    20,658.61x = 346,696,204.59
  5. Step 5: Solve for x
    x = 346,696,204.59/20,658.61
  6. Step 6: Final answer
    x = 16,782.17

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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.