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Finding the Fourth Proportional to 15,527.54, 21,428.54 and 8,813.45

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Solution

The fourth proportional to 15,527.54, 21,428.54 and 8,813.45 is: 12,162.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,527.54 : 21,428.54 = 8,813.45 : x
  2. Step 2: Convert to fraction form
    15,527.54/21,428.54 = 8,813.45/x
  3. Step 3: Cross multiply
    15,527.54x = 21,428.54 × 8,813.45
  4. Step 4: Simplify right side
    15,527.54x = 188,859,214.65
  5. Step 5: Solve for x
    x = 188,859,214.65/15,527.54
  6. Step 6: Final answer
    x = 12,162.86

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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.