Home / 21,135.60-29,165.16-12,636.07

Finding the Fourth Proportional to 21,135.60, 29,165.16 and 12,636.07

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Solution

The fourth proportional to 21,135.60, 29,165.16 and 12,636.07 is: 17,436.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.60 : 29,165.16 = 12,636.07 : x
  2. Step 2: Convert to fraction form
    21,135.60/29,165.16 = 12,636.07/x
  3. Step 3: Cross multiply
    21,135.60x = 29,165.16 × 12,636.07
  4. Step 4: Simplify right side
    21,135.60x = 368,532,977.79
  5. Step 5: Solve for x
    x = 368,532,977.79/21,135.60
  6. Step 6: Final answer
    x = 17,436.60

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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.