Home / 15,931.81-21,953.46-12,324.86

Finding the Fourth Proportional to 15,931.81, 21,953.46 and 12,324.86

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Solution

The fourth proportional to 15,931.81, 21,953.46 and 12,324.86 is: 16,983.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,931.81 : 21,953.46 = 12,324.86 : x
  2. Step 2: Convert to fraction form
    15,931.81/21,953.46 = 12,324.86/x
  3. Step 3: Cross multiply
    15,931.81x = 21,953.46 × 12,324.86
  4. Step 4: Simplify right side
    15,931.81x = 270,573,257.47
  5. Step 5: Solve for x
    x = 270,573,257.47/15,931.81
  6. Step 6: Final answer
    x = 16,983.21

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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.