Home / 20,971.72-28,941.06-11,541.16

Finding the Fourth Proportional to 20,971.72, 28,941.06 and 11,541.16

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Solution

The fourth proportional to 20,971.72, 28,941.06 and 11,541.16 is: 15,926.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.72 : 28,941.06 = 11,541.16 : x
  2. Step 2: Convert to fraction form
    20,971.72/28,941.06 = 11,541.16/x
  3. Step 3: Cross multiply
    20,971.72x = 28,941.06 × 11,541.16
  4. Step 4: Simplify right side
    20,971.72x = 334,013,404.03
  5. Step 5: Solve for x
    x = 334,013,404.03/20,971.72
  6. Step 6: Final answer
    x = 15,926.85

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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.