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Finding the Fourth Proportional to 21,199.96, 29,256.96 and 12,248.65

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Solution

The fourth proportional to 21,199.96, 29,256.96 and 12,248.65 is: 16,903.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.96 : 29,256.96 = 12,248.65 : x
  2. Step 2: Convert to fraction form
    21,199.96/29,256.96 = 12,248.65/x
  3. Step 3: Cross multiply
    21,199.96x = 29,256.96 × 12,248.65
  4. Step 4: Simplify right side
    21,199.96x = 358,358,263.10
  5. Step 5: Solve for x
    x = 358,358,263.10/21,199.96
  6. Step 6: Final answer
    x = 16,903.72

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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.