Home / 21,705.28-29,954.77-12,146.06

Finding the Fourth Proportional to 21,705.28, 29,954.77 and 12,146.06

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Solution

The fourth proportional to 21,705.28, 29,954.77 and 12,146.06 is: 16,762.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,705.28 : 29,954.77 = 12,146.06 : x
  2. Step 2: Convert to fraction form
    21,705.28/29,954.77 = 12,146.06/x
  3. Step 3: Cross multiply
    21,705.28x = 29,954.77 × 12,146.06
  4. Step 4: Simplify right side
    21,705.28x = 363,832,478.23
  5. Step 5: Solve for x
    x = 363,832,478.23/21,705.28
  6. Step 6: Final answer
    x = 16,762.40

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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.