Home / 12,248.91-18,356.81-8,778.51

Finding the Fourth Proportional to 12,248.91, 18,356.81 and 8,778.51

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Solution

The fourth proportional to 12,248.91, 18,356.81 and 8,778.51 is: 13,155.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,248.91 : 18,356.81 = 8,778.51 : x
  2. Step 2: Convert to fraction form
    12,248.91/18,356.81 = 8,778.51/x
  3. Step 3: Cross multiply
    12,248.91x = 18,356.81 × 8,778.51
  4. Step 4: Simplify right side
    12,248.91x = 161,145,396.26
  5. Step 5: Solve for x
    x = 161,145,396.26/12,248.91
  6. Step 6: Final answer
    x = 13,155.90

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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.