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Finding the Fourth Proportional to 10,714.65, 14,790.09 and 8,721.74

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Solution

The fourth proportional to 10,714.65, 14,790.09 and 8,721.74 is: 12,039.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,714.65 : 14,790.09 = 8,721.74 : x
  2. Step 2: Convert to fraction form
    10,714.65/14,790.09 = 8,721.74/x
  3. Step 3: Cross multiply
    10,714.65x = 14,790.09 × 8,721.74
  4. Step 4: Simplify right side
    10,714.65x = 128,995,389.24
  5. Step 5: Solve for x
    x = 128,995,389.24/10,714.65
  6. Step 6: Final answer
    x = 12,039.16

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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.