Home / 21,319.17-29,420.61-11,759.40

Finding the Fourth Proportional to 21,319.17, 29,420.61 and 11,759.40

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Solution

The fourth proportional to 21,319.17, 29,420.61 and 11,759.40 is: 16,228.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,319.17 : 29,420.61 = 11,759.40 : x
  2. Step 2: Convert to fraction form
    21,319.17/29,420.61 = 11,759.40/x
  3. Step 3: Cross multiply
    21,319.17x = 29,420.61 × 11,759.40
  4. Step 4: Simplify right side
    21,319.17x = 345,968,721.23
  5. Step 5: Solve for x
    x = 345,968,721.23/21,319.17
  6. Step 6: Final answer
    x = 16,228.06

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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.