Home / 21,348.70-29,431.56-13,385.62

Finding the Fourth Proportional to 21,348.70, 29,431.56 and 13,385.62

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Solution

The fourth proportional to 21,348.70, 29,431.56 and 13,385.62 is: 18,453.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,348.70 : 29,431.56 = 13,385.62 : x
  2. Step 2: Convert to fraction form
    21,348.70/29,431.56 = 13,385.62/x
  3. Step 3: Cross multiply
    21,348.70x = 29,431.56 × 13,385.62
  4. Step 4: Simplify right side
    21,348.70x = 393,959,678.17
  5. Step 5: Solve for x
    x = 393,959,678.17/21,348.70
  6. Step 6: Final answer
    x = 18,453.57

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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.