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Finding the Fourth Proportional to 21,199.71, 29,256.63 and 12,248.40

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Solution

The fourth proportional to 21,199.71, 29,256.63 and 12,248.40 is: 16,903.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.71 : 29,256.63 = 12,248.40 : x
  2. Step 2: Convert to fraction form
    21,199.71/29,256.63 = 12,248.40/x
  3. Step 3: Cross multiply
    21,199.71x = 29,256.63 × 12,248.40
  4. Step 4: Simplify right side
    21,199.71x = 358,346,906.89
  5. Step 5: Solve for x
    x = 358,346,906.89/21,199.71
  6. Step 6: Final answer
    x = 16,903.39

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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.