Home / 21,220.61-29,287.02-12,149.34

Finding the Fourth Proportional to 21,220.61, 29,287.02 and 12,149.34

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Solution

The fourth proportional to 21,220.61, 29,287.02 and 12,149.34 is: 16,767.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,220.61 : 29,287.02 = 12,149.34 : x
  2. Step 2: Convert to fraction form
    21,220.61/29,287.02 = 12,149.34/x
  3. Step 3: Cross multiply
    21,220.61x = 29,287.02 × 12,149.34
  4. Step 4: Simplify right side
    21,220.61x = 355,817,933.19
  5. Step 5: Solve for x
    x = 355,817,933.19/21,220.61
  6. Step 6: Final answer
    x = 16,767.57

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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.