Home / 21,130.10-29,161.53-12,632.25

Finding the Fourth Proportional to 21,130.10, 29,161.53 and 12,632.25

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Solution

The fourth proportional to 21,130.10, 29,161.53 and 12,632.25 is: 17,433.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.10 : 29,161.53 = 12,632.25 : x
  2. Step 2: Convert to fraction form
    21,130.10/29,161.53 = 12,632.25/x
  3. Step 3: Cross multiply
    21,130.10x = 29,161.53 × 12,632.25
  4. Step 4: Simplify right side
    21,130.10x = 368,375,737.34
  5. Step 5: Solve for x
    x = 368,375,737.34/21,130.10
  6. Step 6: Final answer
    x = 17,433.70

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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.