Home / 12,090.90-18,136.06-7,124.77

Finding the Fourth Proportional to 12,090.90, 18,136.06 and 7,124.77

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Solution

The fourth proportional to 12,090.90, 18,136.06 and 7,124.77 is: 10,686.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,090.90 : 18,136.06 = 7,124.77 : x
  2. Step 2: Convert to fraction form
    12,090.90/18,136.06 = 7,124.77/x
  3. Step 3: Cross multiply
    12,090.90x = 18,136.06 × 7,124.77
  4. Step 4: Simplify right side
    12,090.90x = 129,215,256.21
  5. Step 5: Solve for x
    x = 129,215,256.21/12,090.90
  6. Step 6: Final answer
    x = 10,686.98

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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.