Home / 15,678.10-21,634.91-8,603.96

Finding the Fourth Proportional to 15,678.10, 21,634.91 and 8,603.96

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Solution

The fourth proportional to 15,678.10, 21,634.91 and 8,603.96 is: 11,872.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.10 : 21,634.91 = 8,603.96 : x
  2. Step 2: Convert to fraction form
    15,678.10/21,634.91 = 8,603.96/x
  3. Step 3: Cross multiply
    15,678.10x = 21,634.91 × 8,603.96
  4. Step 4: Simplify right side
    15,678.10x = 186,145,900.24
  5. Step 5: Solve for x
    x = 186,145,900.24/15,678.10
  6. Step 6: Final answer
    x = 11,872.99

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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.