Home / 21,929.53-30,260.91-12,975.47

Finding the Fourth Proportional to 21,929.53, 30,260.91 and 12,975.47

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Solution

The fourth proportional to 21,929.53, 30,260.91 and 12,975.47 is: 17,905.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,929.53 : 30,260.91 = 12,975.47 : x
  2. Step 2: Convert to fraction form
    21,929.53/30,260.91 = 12,975.47/x
  3. Step 3: Cross multiply
    21,929.53x = 30,260.91 × 12,975.47
  4. Step 4: Simplify right side
    21,929.53x = 392,649,540.71
  5. Step 5: Solve for x
    x = 392,649,540.71/21,929.53
  6. Step 6: Final answer
    x = 17,905.06

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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.