Home / 21,513.66-29,685.60-12,080.40

Finding the Fourth Proportional to 21,513.66, 29,685.60 and 12,080.40

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Solution

The fourth proportional to 21,513.66, 29,685.60 and 12,080.40 is: 16,669.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,513.66 : 29,685.60 = 12,080.40 : x
  2. Step 2: Convert to fraction form
    21,513.66/29,685.60 = 12,080.40/x
  3. Step 3: Cross multiply
    21,513.66x = 29,685.60 × 12,080.40
  4. Step 4: Simplify right side
    21,513.66x = 358,613,922.24
  5. Step 5: Solve for x
    x = 358,613,922.24/21,513.66
  6. Step 6: Final answer
    x = 16,669.13

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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.