Home / 21,363.34-29,478.87-12,865.33

Finding the Fourth Proportional to 21,363.34, 29,478.87 and 12,865.33

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Solution

The fourth proportional to 21,363.34, 29,478.87 and 12,865.33 is: 17,752.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,363.34 : 29,478.87 = 12,865.33 : x
  2. Step 2: Convert to fraction form
    21,363.34/29,478.87 = 12,865.33/x
  3. Step 3: Cross multiply
    21,363.34x = 29,478.87 × 12,865.33
  4. Step 4: Simplify right side
    21,363.34x = 379,255,243.18
  5. Step 5: Solve for x
    x = 379,255,243.18/21,363.34
  6. Step 6: Final answer
    x = 17,752.62

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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.