Home / 21,128.75-29,157.62-12,176.17

Finding the Fourth Proportional to 21,128.75, 29,157.62 and 12,176.17

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Solution

The fourth proportional to 21,128.75, 29,157.62 and 12,176.17 is: 16,803.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.75 : 29,157.62 = 12,176.17 : x
  2. Step 2: Convert to fraction form
    21,128.75/29,157.62 = 12,176.17/x
  3. Step 3: Cross multiply
    21,128.75x = 29,157.62 × 12,176.17
  4. Step 4: Simplify right side
    21,128.75x = 355,027,931.25
  5. Step 5: Solve for x
    x = 355,027,931.25/21,128.75
  6. Step 6: Final answer
    x = 16,803.08

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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.