Home / 20,637.60-30,940.80-10,256.64

Finding the Fourth Proportional to 20,637.60, 30,940.80 and 10,256.64

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Solution

The fourth proportional to 20,637.60, 30,940.80 and 10,256.64 is: 15,377.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,637.60 : 30,940.80 = 10,256.64 : x
  2. Step 2: Convert to fraction form
    20,637.60/30,940.80 = 10,256.64/x
  3. Step 3: Cross multiply
    20,637.60x = 30,940.80 × 10,256.64
  4. Step 4: Simplify right side
    20,637.60x = 317,348,646.91
  5. Step 5: Solve for x
    x = 317,348,646.91/20,637.60
  6. Step 6: Final answer
    x = 15,377.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.