Home / 21,157.16-29,196.80-11,725.72

Finding the Fourth Proportional to 21,157.16, 29,196.80 and 11,725.72

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Solution

The fourth proportional to 21,157.16, 29,196.80 and 11,725.72 is: 16,181.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,157.16 : 29,196.80 = 11,725.72 : x
  2. Step 2: Convert to fraction form
    21,157.16/29,196.80 = 11,725.72/x
  3. Step 3: Cross multiply
    21,157.16x = 29,196.80 × 11,725.72
  4. Step 4: Simplify right side
    21,157.16x = 342,353,501.70
  5. Step 5: Solve for x
    x = 342,353,501.70/21,157.16
  6. Step 6: Final answer
    x = 16,181.45

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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.