Home / 20,130.04-30,185.31-8,440.12

Finding the Fourth Proportional to 20,130.04, 30,185.31 and 8,440.12

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Solution

The fourth proportional to 20,130.04, 30,185.31 and 8,440.12 is: 12,656.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,130.04 : 30,185.31 = 8,440.12 : x
  2. Step 2: Convert to fraction form
    20,130.04/30,185.31 = 8,440.12/x
  3. Step 3: Cross multiply
    20,130.04x = 30,185.31 × 8,440.12
  4. Step 4: Simplify right side
    20,130.04x = 254,767,638.64
  5. Step 5: Solve for x
    x = 254,767,638.64/20,130.04
  6. Step 6: Final answer
    x = 12,656.09

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Double scale
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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.