Home / 21,561.02-29,751.80-12,129.38

Finding the Fourth Proportional to 21,561.02, 29,751.80 and 12,129.38

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Solution

The fourth proportional to 21,561.02, 29,751.80 and 12,129.38 is: 16,737.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,561.02 : 29,751.80 = 12,129.38 : x
  2. Step 2: Convert to fraction form
    21,561.02/29,751.80 = 12,129.38/x
  3. Step 3: Cross multiply
    21,561.02x = 29,751.80 × 12,129.38
  4. Step 4: Simplify right side
    21,561.02x = 360,870,887.88
  5. Step 5: Solve for x
    x = 360,870,887.88/21,561.02
  6. Step 6: Final answer
    x = 16,737.19

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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.