Home / 22,199.76-30,635.64-12,128.40

Finding the Fourth Proportional to 22,199.76, 30,635.64 and 12,128.40

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Solution

The fourth proportional to 22,199.76, 30,635.64 and 12,128.40 is: 16,737.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,199.76 : 30,635.64 = 12,128.40 : x
  2. Step 2: Convert to fraction form
    22,199.76/30,635.64 = 12,128.40/x
  3. Step 3: Cross multiply
    22,199.76x = 30,635.64 × 12,128.40
  4. Step 4: Simplify right side
    22,199.76x = 371,561,296.18
  5. Step 5: Solve for x
    x = 371,561,296.18/22,199.76
  6. Step 6: Final answer
    x = 16,737.18

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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.