Home / 21,260.40-29,379.81-15,945.99

Finding the Fourth Proportional to 21,260.40, 29,379.81 and 15,945.99

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Solution

The fourth proportional to 21,260.40, 29,379.81 and 15,945.99 is: 22,035.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,260.40 : 29,379.81 = 15,945.99 : x
  2. Step 2: Convert to fraction form
    21,260.40/29,379.81 = 15,945.99/x
  3. Step 3: Cross multiply
    21,260.40x = 29,379.81 × 15,945.99
  4. Step 4: Simplify right side
    21,260.40x = 468,490,156.46
  5. Step 5: Solve for x
    x = 468,490,156.46/21,260.40
  6. Step 6: Final answer
    x = 22,035.81

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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.