Home / 20,578.17-28,397.30-12,080.16

Finding the Fourth Proportional to 20,578.17, 28,397.30 and 12,080.16

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Solution

The fourth proportional to 20,578.17, 28,397.30 and 12,080.16 is: 16,670.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.17 : 28,397.30 = 12,080.16 : x
  2. Step 2: Convert to fraction form
    20,578.17/28,397.30 = 12,080.16/x
  3. Step 3: Cross multiply
    20,578.17x = 28,397.30 × 12,080.16
  4. Step 4: Simplify right side
    20,578.17x = 343,043,946.59
  5. Step 5: Solve for x
    x = 343,043,946.59/20,578.17
  6. Step 6: Final answer
    x = 16,670.28

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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.