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Finding the Fourth Proportional to 8,700.45, 12,006.63 and 4,721.63

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Solution

The fourth proportional to 8,700.45, 12,006.63 and 4,721.63 is: 6,515.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,700.45 : 12,006.63 = 4,721.63 : x
  2. Step 2: Convert to fraction form
    8,700.45/12,006.63 = 4,721.63/x
  3. Step 3: Cross multiply
    8,700.45x = 12,006.63 × 4,721.63
  4. Step 4: Simplify right side
    8,700.45x = 56,690,864.41
  5. Step 5: Solve for x
    x = 56,690,864.41/8,700.45
  6. Step 6: Final answer
    x = 6,515.85

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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.