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Finding the Fourth Proportional to 21,199.56, 29,256.72 and 12,248.68

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Solution

The fourth proportional to 21,199.56, 29,256.72 and 12,248.68 is: 16,903.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.56 : 29,256.72 = 12,248.68 : x
  2. Step 2: Convert to fraction form
    21,199.56/29,256.72 = 12,248.68/x
  3. Step 3: Cross multiply
    21,199.56x = 29,256.72 × 12,248.68
  4. Step 4: Simplify right side
    21,199.56x = 358,356,201.13
  5. Step 5: Solve for x
    x = 358,356,201.13/21,199.56
  6. Step 6: Final answer
    x = 16,903.95

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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.