Home / 15,726.52-21,733.68-12,889.36

Finding the Fourth Proportional to 15,726.52, 21,733.68 and 12,889.36

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Solution

The fourth proportional to 15,726.52, 21,733.68 and 12,889.36 is: 17,812.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,726.52 : 21,733.68 = 12,889.36 : x
  2. Step 2: Convert to fraction form
    15,726.52/21,733.68 = 12,889.36/x
  3. Step 3: Cross multiply
    15,726.52x = 21,733.68 × 12,889.36
  4. Step 4: Simplify right side
    15,726.52x = 280,133,225.64
  5. Step 5: Solve for x
    x = 280,133,225.64/15,726.52
  6. Step 6: Final answer
    x = 17,812.79

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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.