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Finding the Fourth Proportional to 8,689.86, 13,024.53 and 3,140.28

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Solution

The fourth proportional to 8,689.86, 13,024.53 and 3,140.28 is: 4,706.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,689.86 : 13,024.53 = 3,140.28 : x
  2. Step 2: Convert to fraction form
    8,689.86/13,024.53 = 3,140.28/x
  3. Step 3: Cross multiply
    8,689.86x = 13,024.53 × 3,140.28
  4. Step 4: Simplify right side
    8,689.86x = 40,900,671.07
  5. Step 5: Solve for x
    x = 40,900,671.07/8,689.86
  6. Step 6: Final answer
    x = 4,706.71

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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.