Home / 15,678.04-21,634.82-8,603.90

Finding the Fourth Proportional to 15,678.04, 21,634.82 and 8,603.90

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Solution

The fourth proportional to 15,678.04, 21,634.82 and 8,603.90 is: 11,872.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,678.04 : 21,634.82 = 8,603.90 : x
  2. Step 2: Convert to fraction form
    15,678.04/21,634.82 = 8,603.90/x
  3. Step 3: Cross multiply
    15,678.04x = 21,634.82 × 8,603.90
  4. Step 4: Simplify right side
    15,678.04x = 186,143,827.80
  5. Step 5: Solve for x
    x = 186,143,827.80/15,678.04
  6. Step 6: Final answer
    x = 11,872.91

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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.