Home / 21,509.15-29,679.41-12,075.89

Finding the Fourth Proportional to 21,509.15, 29,679.41 and 12,075.89

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Solution

The fourth proportional to 21,509.15, 29,679.41 and 12,075.89 is: 16,662.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,509.15 : 29,679.41 = 12,075.89 : x
  2. Step 2: Convert to fraction form
    21,509.15/29,679.41 = 12,075.89/x
  3. Step 3: Cross multiply
    21,509.15x = 29,679.41 × 12,075.89
  4. Step 4: Simplify right side
    21,509.15x = 358,405,172.22
  5. Step 5: Solve for x
    x = 358,405,172.22/21,509.15
  6. Step 6: Final answer
    x = 16,662.92

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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.