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Finding the Fourth Proportional to 15,678.63, 23,485.01 and 12,726.99

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Solution

The fourth proportional to 15,678.63, 23,485.01 and 12,726.99 is: 19,063.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.63 : 23,485.01 = 12,726.99 : x
  2. Step 2: Convert to fraction form
    15,678.63/23,485.01 = 12,726.99/x
  3. Step 3: Cross multiply
    15,678.63x = 23,485.01 × 12,726.99
  4. Step 4: Simplify right side
    15,678.63x = 298,893,423.78
  5. Step 5: Solve for x
    x = 298,893,423.78/15,678.63
  6. Step 6: Final answer
    x = 19,063.75

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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.