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Finding the Fourth Proportional to 18,756.63, 28,126.74 and 8,898.72

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Solution

The fourth proportional to 18,756.63, 28,126.74 and 8,898.72 is: 13,344.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,756.63 : 28,126.74 = 8,898.72 : x
  2. Step 2: Convert to fraction form
    18,756.63/28,126.74 = 8,898.72/x
  3. Step 3: Cross multiply
    18,756.63x = 28,126.74 × 8,898.72
  4. Step 4: Simplify right side
    18,756.63x = 250,291,983.77
  5. Step 5: Solve for x
    x = 250,291,983.77/18,756.63
  6. Step 6: Final answer
    x = 13,344.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.