Home / 21,229.02-29,316.11-13,688.91

Finding the Fourth Proportional to 21,229.02, 29,316.11 and 13,688.91

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Solution

The fourth proportional to 21,229.02, 29,316.11 and 13,688.91 is: 18,903.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,229.02 : 29,316.11 = 13,688.91 : x
  2. Step 2: Convert to fraction form
    21,229.02/29,316.11 = 13,688.91/x
  3. Step 3: Cross multiply
    21,229.02x = 29,316.11 × 13,688.91
  4. Step 4: Simplify right side
    21,229.02x = 401,305,522.90
  5. Step 5: Solve for x
    x = 401,305,522.90/21,229.02
  6. Step 6: Final answer
    x = 18,903.63

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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.