Home / 21,419.76-29,559.26-11,988.32

Finding the Fourth Proportional to 21,419.76, 29,559.26 and 11,988.32

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Solution

The fourth proportional to 21,419.76, 29,559.26 and 11,988.32 is: 16,543.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,419.76 : 29,559.26 = 11,988.32 : x
  2. Step 2: Convert to fraction form
    21,419.76/29,559.26 = 11,988.32/x
  3. Step 3: Cross multiply
    21,419.76x = 29,559.26 × 11,988.32
  4. Step 4: Simplify right side
    21,419.76x = 354,365,916.29
  5. Step 5: Solve for x
    x = 354,365,916.29/21,419.76
  6. Step 6: Final answer
    x = 16,543.88

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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.