Home / 20,660.88-28,505.28-12,045.12

Finding the Fourth Proportional to 20,660.88, 28,505.28 and 12,045.12

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Solution

The fourth proportional to 20,660.88, 28,505.28 and 12,045.12 is: 16,618.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.88 : 28,505.28 = 12,045.12 : x
  2. Step 2: Convert to fraction form
    20,660.88/28,505.28 = 12,045.12/x
  3. Step 3: Cross multiply
    20,660.88x = 28,505.28 × 12,045.12
  4. Step 4: Simplify right side
    20,660.88x = 343,349,518.23
  5. Step 5: Solve for x
    x = 343,349,518.23/20,660.88
  6. Step 6: Final answer
    x = 16,618.34

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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.