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Finding the Fourth Proportional to 21,295.31, 29,386.80 and 12,341.97

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Solution

The fourth proportional to 21,295.31, 29,386.80 and 12,341.97 is: 17,031.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,295.31 : 29,386.80 = 12,341.97 : x
  2. Step 2: Convert to fraction form
    21,295.31/29,386.80 = 12,341.97/x
  3. Step 3: Cross multiply
    21,295.31x = 29,386.80 × 12,341.97
  4. Step 4: Simplify right side
    21,295.31x = 362,691,004.00
  5. Step 5: Solve for x
    x = 362,691,004.00/21,295.31
  6. Step 6: Final answer
    x = 17,031.50

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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.