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Finding the Fourth Proportional to 20,752.50, 28,638.45 and 13,300.50

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Solution

The fourth proportional to 20,752.50, 28,638.45 and 13,300.50 is: 18,354.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,752.50 : 28,638.45 = 13,300.50 : x
  2. Step 2: Convert to fraction form
    20,752.50/28,638.45 = 13,300.50/x
  3. Step 3: Cross multiply
    20,752.50x = 28,638.45 × 13,300.50
  4. Step 4: Simplify right side
    20,752.50x = 380,905,704.23
  5. Step 5: Solve for x
    x = 380,905,704.23/20,752.50
  6. Step 6: Final answer
    x = 18,354.69

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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.