Home / 21,139.16-29,171.67-11,707.52

Finding the Fourth Proportional to 21,139.16, 29,171.67 and 11,707.52

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Solution

The fourth proportional to 21,139.16, 29,171.67 and 11,707.52 is: 16,156.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,139.16 : 29,171.67 = 11,707.52 : x
  2. Step 2: Convert to fraction form
    21,139.16/29,171.67 = 11,707.52/x
  3. Step 3: Cross multiply
    21,139.16x = 29,171.67 × 11,707.52
  4. Step 4: Simplify right side
    21,139.16x = 341,527,764.10
  5. Step 5: Solve for x
    x = 341,527,764.10/21,139.16
  6. Step 6: Final answer
    x = 16,156.17

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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.