Home / 21,561.45-29,754.75-12,130.01

Finding the Fourth Proportional to 21,561.45, 29,754.75 and 12,130.01

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Solution

The fourth proportional to 21,561.45, 29,754.75 and 12,130.01 is: 16,739.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,561.45 : 29,754.75 = 12,130.01 : x
  2. Step 2: Convert to fraction form
    21,561.45/29,754.75 = 12,130.01/x
  3. Step 3: Cross multiply
    21,561.45x = 29,754.75 × 12,130.01
  4. Step 4: Simplify right side
    21,561.45x = 360,925,415.05
  5. Step 5: Solve for x
    x = 360,925,415.05/21,561.45
  6. Step 6: Final answer
    x = 16,739.39

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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.