Home / 21,419.02-29,558.64-11,987.56

Finding the Fourth Proportional to 21,419.02, 29,558.64 and 11,987.56

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Solution

The fourth proportional to 21,419.02, 29,558.64 and 11,987.56 is: 16,543.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,419.02 : 29,558.64 = 11,987.56 : x
  2. Step 2: Convert to fraction form
    21,419.02/29,558.64 = 11,987.56/x
  3. Step 3: Cross multiply
    21,419.02x = 29,558.64 × 11,987.56
  4. Step 4: Simplify right side
    21,419.02x = 354,335,970.52
  5. Step 5: Solve for x
    x = 354,335,970.52/21,419.02
  6. Step 6: Final answer
    x = 16,543.05

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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.