Home / 30,123.78-45,175.27-12,349.39

Finding the Fourth Proportional to 30,123.78, 45,175.27 and 12,349.39

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Solution

The fourth proportional to 30,123.78, 45,175.27 and 12,349.39 is: 18,519.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,123.78 : 45,175.27 = 12,349.39 : x
  2. Step 2: Convert to fraction form
    30,123.78/45,175.27 = 12,349.39/x
  3. Step 3: Cross multiply
    30,123.78x = 45,175.27 × 12,349.39
  4. Step 4: Simplify right side
    30,123.78x = 557,887,111.38
  5. Step 5: Solve for x
    x = 557,887,111.38/30,123.78
  6. Step 6: Final answer
    x = 18,519.82

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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.