Home / 31,578.31-47,384.07-12,872.17

Finding the Fourth Proportional to 31,578.31, 47,384.07 and 12,872.17

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Solution

The fourth proportional to 31,578.31, 47,384.07 and 12,872.17 is: 19,315.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,578.31 : 47,384.07 = 12,872.17 : x
  2. Step 2: Convert to fraction form
    31,578.31/47,384.07 = 12,872.17/x
  3. Step 3: Cross multiply
    31,578.31x = 47,384.07 × 12,872.17
  4. Step 4: Simplify right side
    31,578.31x = 609,935,804.33
  5. Step 5: Solve for x
    x = 609,935,804.33/31,578.31
  6. Step 6: Final answer
    x = 19,315.02

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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.