Home / 15,931.44-21,970.32-12,147.96

Finding the Fourth Proportional to 15,931.44, 21,970.32 and 12,147.96

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Solution

The fourth proportional to 15,931.44, 21,970.32 and 12,147.96 is: 16,752.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,931.44 : 21,970.32 = 12,147.96 : x
  2. Step 2: Convert to fraction form
    15,931.44/21,970.32 = 12,147.96/x
  3. Step 3: Cross multiply
    15,931.44x = 21,970.32 × 12,147.96
  4. Step 4: Simplify right side
    15,931.44x = 266,894,568.55
  5. Step 5: Solve for x
    x = 266,894,568.55/15,931.44
  6. Step 6: Final answer
    x = 16,752.70

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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.