Home / 12,066.42-18,085.64-7,140.20

Finding the Fourth Proportional to 12,066.42, 18,085.64 and 7,140.20

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Solution

The fourth proportional to 12,066.42, 18,085.64 and 7,140.20 is: 10,702.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,066.42 : 18,085.64 = 7,140.20 : x
  2. Step 2: Convert to fraction form
    12,066.42/18,085.64 = 7,140.20/x
  3. Step 3: Cross multiply
    12,066.42x = 18,085.64 × 7,140.20
  4. Step 4: Simplify right side
    12,066.42x = 129,134,960.60
  5. Step 5: Solve for x
    x = 129,134,960.60/12,066.42
  6. Step 6: Final answer
    x = 10,702.01

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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.