Home / 20,646.55-28,490.83-11,214.91

Finding the Fourth Proportional to 20,646.55, 28,490.83 and 11,214.91

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Solution

The fourth proportional to 20,646.55, 28,490.83 and 11,214.91 is: 15,475.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,646.55 : 28,490.83 = 11,214.91 : x
  2. Step 2: Convert to fraction form
    20,646.55/28,490.83 = 11,214.91/x
  3. Step 3: Cross multiply
    20,646.55x = 28,490.83 × 11,214.91
  4. Step 4: Simplify right side
    20,646.55x = 319,522,094.28
  5. Step 5: Solve for x
    x = 319,522,094.28/20,646.55
  6. Step 6: Final answer
    x = 15,475.81

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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.