Home / 21,478.72-29,623.98-13,911.70

Finding the Fourth Proportional to 21,478.72, 29,623.98 and 13,911.70

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Solution

The fourth proportional to 21,478.72, 29,623.98 and 13,911.70 is: 19,187.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,478.72 : 29,623.98 = 13,911.70 : x
  2. Step 2: Convert to fraction form
    21,478.72/29,623.98 = 13,911.70/x
  3. Step 3: Cross multiply
    21,478.72x = 29,623.98 × 13,911.70
  4. Step 4: Simplify right side
    21,478.72x = 412,119,922.57
  5. Step 5: Solve for x
    x = 412,119,922.57/21,478.72
  6. Step 6: Final answer
    x = 19,187.36

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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.