Home / 21,862.08-32,812.20-12,520.80

Finding the Fourth Proportional to 21,862.08, 32,812.20 and 12,520.80

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Solution

The fourth proportional to 21,862.08, 32,812.20 and 12,520.80 is: 18,792.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,862.08 : 32,812.20 = 12,520.80 : x
  2. Step 2: Convert to fraction form
    21,862.08/32,812.20 = 12,520.80/x
  3. Step 3: Cross multiply
    21,862.08x = 32,812.20 × 12,520.80
  4. Step 4: Simplify right side
    21,862.08x = 410,834,993.76
  5. Step 5: Solve for x
    x = 410,834,993.76/21,862.08
  6. Step 6: Final answer
    x = 18,792.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.