Home / 21,391.60-29,512.87-12,437.05

Finding the Fourth Proportional to 21,391.60, 29,512.87 and 12,437.05

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Solution

The fourth proportional to 21,391.60, 29,512.87 and 12,437.05 is: 17,158.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.60 : 29,512.87 = 12,437.05 : x
  2. Step 2: Convert to fraction form
    21,391.60/29,512.87 = 12,437.05/x
  3. Step 3: Cross multiply
    21,391.60x = 29,512.87 × 12,437.05
  4. Step 4: Simplify right side
    21,391.60x = 367,053,039.83
  5. Step 5: Solve for x
    x = 367,053,039.83/21,391.60
  6. Step 6: Final answer
    x = 17,158.75

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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.