Home / 21,509.13-29,681.60-11,949.64

Finding the Fourth Proportional to 21,509.13, 29,681.60 and 11,949.64

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Solution

The fourth proportional to 21,509.13, 29,681.60 and 11,949.64 is: 16,489.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,509.13 : 29,681.60 = 11,949.64 : x
  2. Step 2: Convert to fraction form
    21,509.13/29,681.60 = 11,949.64/x
  3. Step 3: Cross multiply
    21,509.13x = 29,681.60 × 11,949.64
  4. Step 4: Simplify right side
    21,509.13x = 354,684,300.67
  5. Step 5: Solve for x
    x = 354,684,300.67/21,509.13
  6. Step 6: Final answer
    x = 16,489.94

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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.