Home / 21,660.76-29,878.36-13,154.60

Finding the Fourth Proportional to 21,660.76, 29,878.36 and 13,154.60

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Solution

The fourth proportional to 21,660.76, 29,878.36 and 13,154.60 is: 18,145.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,660.76 : 29,878.36 = 13,154.60 : x
  2. Step 2: Convert to fraction form
    21,660.76/29,878.36 = 13,154.60/x
  3. Step 3: Cross multiply
    21,660.76x = 29,878.36 × 13,154.60
  4. Step 4: Simplify right side
    21,660.76x = 393,037,874.46
  5. Step 5: Solve for x
    x = 393,037,874.46/21,660.76
  6. Step 6: Final answer
    x = 18,145.16

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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.