Home / 21,977-30,328.28-12,545.36

Finding the Fourth Proportional to 21,977, 30,328.28 and 12,545.36

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Solution

The fourth proportional to 21,977, 30,328.28 and 12,545.36 is: 17,312.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,977 : 30,328.28 = 12,545.36 : x
  2. Step 2: Convert to fraction form
    21,977/30,328.28 = 12,545.36/x
  3. Step 3: Cross multiply
    21,977x = 30,328.28 × 12,545.36
  4. Step 4: Simplify right side
    21,977x = 380,479,190.78
  5. Step 5: Solve for x
    x = 380,479,190.78/21,977
  6. Step 6: Final answer
    x = 17,312.61

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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.