Home / 21,700.36-29,930.07-15,751.72

Finding the Fourth Proportional to 21,700.36, 29,930.07 and 15,751.72

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Solution

The fourth proportional to 21,700.36, 29,930.07 and 15,751.72 is: 21,725.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,700.36 : 29,930.07 = 15,751.72 : x
  2. Step 2: Convert to fraction form
    21,700.36/29,930.07 = 15,751.72/x
  3. Step 3: Cross multiply
    21,700.36x = 29,930.07 × 15,751.72
  4. Step 4: Simplify right side
    21,700.36x = 471,450,082.22
  5. Step 5: Solve for x
    x = 471,450,082.22/21,700.36
  6. Step 6: Final answer
    x = 21,725.45

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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.