Home / 21,116.66-29,140.76-11,685.29

Finding the Fourth Proportional to 21,116.66, 29,140.76 and 11,685.29

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Solution

The fourth proportional to 21,116.66, 29,140.76 and 11,685.29 is: 16,125.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.66 : 29,140.76 = 11,685.29 : x
  2. Step 2: Convert to fraction form
    21,116.66/29,140.76 = 11,685.29/x
  3. Step 3: Cross multiply
    21,116.66x = 29,140.76 × 11,685.29
  4. Step 4: Simplify right side
    21,116.66x = 340,518,231.42
  5. Step 5: Solve for x
    x = 340,518,231.42/21,116.66
  6. Step 6: Final answer
    x = 16,125.57

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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.