Home / 42,872.94-64,319.13-13,291.74

Finding the Fourth Proportional to 42,872.94, 64,319.13 and 13,291.74

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Solution

The fourth proportional to 42,872.94, 64,319.13 and 13,291.74 is: 19,940.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,872.94 : 64,319.13 = 13,291.74 : x
  2. Step 2: Convert to fraction form
    42,872.94/64,319.13 = 13,291.74/x
  3. Step 3: Cross multiply
    42,872.94x = 64,319.13 × 13,291.74
  4. Step 4: Simplify right side
    42,872.94x = 854,913,152.99
  5. Step 5: Solve for x
    x = 854,913,152.99/42,872.94
  6. Step 6: Final answer
    x = 19,940.62

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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.