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Finding the Fourth Proportional to 12,030.39, 18,045.18 and 4,239

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Solution

The fourth proportional to 12,030.39, 18,045.18 and 4,239 is: 6,358.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,030.39 : 18,045.18 = 4,239 : x
  2. Step 2: Convert to fraction form
    12,030.39/18,045.18 = 4,239/x
  3. Step 3: Cross multiply
    12,030.39x = 18,045.18 × 4,239
  4. Step 4: Simplify right side
    12,030.39x = 76,493,518.02
  5. Step 5: Solve for x
    x = 76,493,518.02/12,030.39
  6. Step 6: Final answer
    x = 6,358.36

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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.