Home / 21,208.78-29,265.90-12,259.18

Finding the Fourth Proportional to 21,208.78, 29,265.90 and 12,259.18

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Solution

The fourth proportional to 21,208.78, 29,265.90 and 12,259.18 is: 16,916.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,208.78 : 29,265.90 = 12,259.18 : x
  2. Step 2: Convert to fraction form
    21,208.78/29,265.90 = 12,259.18/x
  3. Step 3: Cross multiply
    21,208.78x = 29,265.90 × 12,259.18
  4. Step 4: Simplify right side
    21,208.78x = 358,775,935.96
  5. Step 5: Solve for x
    x = 358,775,935.96/21,208.78
  6. Step 6: Final answer
    x = 16,916.39

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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.