Home / 21,140.72-29,174.28-11,709.08

Finding the Fourth Proportional to 21,140.72, 29,174.28 and 11,709.08

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Solution

The fourth proportional to 21,140.72, 29,174.28 and 11,709.08 is: 16,158.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.72 : 29,174.28 = 11,709.08 : x
  2. Step 2: Convert to fraction form
    21,140.72/29,174.28 = 11,709.08/x
  3. Step 3: Cross multiply
    21,140.72x = 29,174.28 × 11,709.08
  4. Step 4: Simplify right side
    21,140.72x = 341,603,978.46
  5. Step 5: Solve for x
    x = 341,603,978.46/21,140.72
  6. Step 6: Final answer
    x = 16,158.58

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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.