Home / 21,857.04-30,161.57-12,901.28

Finding the Fourth Proportional to 21,857.04, 30,161.57 and 12,901.28

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Solution

The fourth proportional to 21,857.04, 30,161.57 and 12,901.28 is: 17,803.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,857.04 : 30,161.57 = 12,901.28 : x
  2. Step 2: Convert to fraction form
    21,857.04/30,161.57 = 12,901.28/x
  3. Step 3: Cross multiply
    21,857.04x = 30,161.57 × 12,901.28
  4. Step 4: Simplify right side
    21,857.04x = 389,122,644.50
  5. Step 5: Solve for x
    x = 389,122,644.50/21,857.04
  6. Step 6: Final answer
    x = 17,803.08

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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.