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Finding the Fourth Proportional to 15,624.65, 21,561.59 and 8,910.12

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Solution

The fourth proportional to 15,624.65, 21,561.59 and 8,910.12 is: 12,295.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,624.65 : 21,561.59 = 8,910.12 : x
  2. Step 2: Convert to fraction form
    15,624.65/21,561.59 = 8,910.12/x
  3. Step 3: Cross multiply
    15,624.65x = 21,561.59 × 8,910.12
  4. Step 4: Simplify right side
    15,624.65x = 192,116,457.42
  5. Step 5: Solve for x
    x = 192,116,457.42/15,624.65
  6. Step 6: Final answer
    x = 12,295.73

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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.