Home / 21,159.40-29,201.70-11,730.76

Finding the Fourth Proportional to 21,159.40, 29,201.70 and 11,730.76

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Solution

The fourth proportional to 21,159.40, 29,201.70 and 11,730.76 is: 16,189.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.40 : 29,201.70 = 11,730.76 : x
  2. Step 2: Convert to fraction form
    21,159.40/29,201.70 = 11,730.76/x
  3. Step 3: Cross multiply
    21,159.40x = 29,201.70 × 11,730.76
  4. Step 4: Simplify right side
    21,159.40x = 342,558,134.29
  5. Step 5: Solve for x
    x = 342,558,134.29/21,159.40
  6. Step 6: Final answer
    x = 16,189.41

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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.