Home / 21,557.80-29,750.01-12,126.28

Finding the Fourth Proportional to 21,557.80, 29,750.01 and 12,126.28

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Solution

The fourth proportional to 21,557.80, 29,750.01 and 12,126.28 is: 16,734.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,557.80 : 29,750.01 = 12,126.28 : x
  2. Step 2: Convert to fraction form
    21,557.80/29,750.01 = 12,126.28/x
  3. Step 3: Cross multiply
    21,557.80x = 29,750.01 × 12,126.28
  4. Step 4: Simplify right side
    21,557.80x = 360,756,951.26
  5. Step 5: Solve for x
    x = 360,756,951.26/21,557.80
  6. Step 6: Final answer
    x = 16,734.40

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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.