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Finding the Fourth Proportional to 20,504.55, 28,111.71 and 20,130.87

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Solution

The fourth proportional to 20,504.55, 28,111.71 and 20,130.87 is: 27,599.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,504.55 : 28,111.71 = 20,130.87 : x
  2. Step 2: Convert to fraction form
    20,504.55/28,111.71 = 20,130.87/x
  3. Step 3: Cross multiply
    20,504.55x = 28,111.71 × 20,130.87
  4. Step 4: Simplify right side
    20,504.55x = 565,913,179.49
  5. Step 5: Solve for x
    x = 565,913,179.49/20,504.55
  6. Step 6: Final answer
    x = 27,599.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.