Home / 19,428.12-29,125.08-12,840.48

Finding the Fourth Proportional to 19,428.12, 29,125.08 and 12,840.48

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Solution

The fourth proportional to 19,428.12, 29,125.08 and 12,840.48 is: 19,249.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,428.12 : 29,125.08 = 12,840.48 : x
  2. Step 2: Convert to fraction form
    19,428.12/29,125.08 = 12,840.48/x
  3. Step 3: Cross multiply
    19,428.12x = 29,125.08 × 12,840.48
  4. Step 4: Simplify right side
    19,428.12x = 373,980,007.24
  5. Step 5: Solve for x
    x = 373,980,007.24/19,428.12
  6. Step 6: Final answer
    x = 19,249.42

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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.