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Finding the Fourth Proportional to 14,689.83, 20,287.10 and 12,581.67

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Solution

The fourth proportional to 14,689.83, 20,287.10 and 12,581.67 is: 17,375.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,689.83 : 20,287.10 = 12,581.67 : x
  2. Step 2: Convert to fraction form
    14,689.83/20,287.10 = 12,581.67/x
  3. Step 3: Cross multiply
    14,689.83x = 20,287.10 × 12,581.67
  4. Step 4: Simplify right side
    14,689.83x = 255,245,534.55
  5. Step 5: Solve for x
    x = 255,245,534.55/14,689.83
  6. Step 6: Final answer
    x = 17,375.66

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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.