Home / 21,124.36-29,158.10-12,177.83

Finding the Fourth Proportional to 21,124.36, 29,158.10 and 12,177.83

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Solution

The fourth proportional to 21,124.36, 29,158.10 and 12,177.83 is: 16,809.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,124.36 : 29,158.10 = 12,177.83 : x
  2. Step 2: Convert to fraction form
    21,124.36/29,158.10 = 12,177.83/x
  3. Step 3: Cross multiply
    21,124.36x = 29,158.10 × 12,177.83
  4. Step 4: Simplify right side
    21,124.36x = 355,082,384.92
  5. Step 5: Solve for x
    x = 355,082,384.92/21,124.36
  6. Step 6: Final answer
    x = 16,809.14

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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.