Home / 21,929.70-32,686.09-20,684.19

Finding the Fourth Proportional to 21,929.70, 32,686.09 and 20,684.19

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Solution

The fourth proportional to 21,929.70, 32,686.09 and 20,684.19 is: 30,829.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,929.70 : 32,686.09 = 20,684.19 : x
  2. Step 2: Convert to fraction form
    21,929.70/32,686.09 = 20,684.19/x
  3. Step 3: Cross multiply
    21,929.70x = 32,686.09 × 20,684.19
  4. Step 4: Simplify right side
    21,929.70x = 676,085,192.50
  5. Step 5: Solve for x
    x = 676,085,192.50/21,929.70
  6. Step 6: Final answer
    x = 30,829.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.