Home / 21,140.54-31,683.26-11,780.18

Finding the Fourth Proportional to 21,140.54, 31,683.26 and 11,780.18

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Solution

The fourth proportional to 21,140.54, 31,683.26 and 11,780.18 is: 17,654.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,140.54 : 31,683.26 = 11,780.18 : x
  2. Step 2: Convert to fraction form
    21,140.54/31,683.26 = 11,780.18/x
  3. Step 3: Cross multiply
    21,140.54x = 31,683.26 × 11,780.18
  4. Step 4: Simplify right side
    21,140.54x = 373,234,495.63
  5. Step 5: Solve for x
    x = 373,234,495.63/21,140.54
  6. Step 6: Final answer
    x = 17,654.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.