Home / 21,127.92-29,159.60-12,173.68

Finding the Fourth Proportional to 21,127.92, 29,159.60 and 12,173.68

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Solution

The fourth proportional to 21,127.92, 29,159.60 and 12,173.68 is: 16,801.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,127.92 : 29,159.60 = 12,173.68 : x
  2. Step 2: Convert to fraction form
    21,127.92/29,159.60 = 12,173.68/x
  3. Step 3: Cross multiply
    21,127.92x = 29,159.60 × 12,173.68
  4. Step 4: Simplify right side
    21,127.92x = 354,979,639.33
  5. Step 5: Solve for x
    x = 354,979,639.33/21,127.92
  6. Step 6: Final answer
    x = 16,801.45

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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.