Home / 12,578.48-18,875.91-4,787.36

Finding the Fourth Proportional to 12,578.48, 18,875.91 and 4,787.36

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Solution

The fourth proportional to 12,578.48, 18,875.91 and 4,787.36 is: 7,184.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,578.48 : 18,875.91 = 4,787.36 : x
  2. Step 2: Convert to fraction form
    12,578.48/18,875.91 = 4,787.36/x
  3. Step 3: Cross multiply
    12,578.48x = 18,875.91 × 4,787.36
  4. Step 4: Simplify right side
    12,578.48x = 90,365,776.50
  5. Step 5: Solve for x
    x = 90,365,776.50/12,578.48
  6. Step 6: Final answer
    x = 7,184.16

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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.