Home / 13,218.69-18,226.50-8,972.49

Finding the Fourth Proportional to 13,218.69, 18,226.50 and 8,972.49

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Solution

The fourth proportional to 13,218.69, 18,226.50 and 8,972.49 is: 12,371.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.69 : 18,226.50 = 8,972.49 : x
  2. Step 2: Convert to fraction form
    13,218.69/18,226.50 = 8,972.49/x
  3. Step 3: Cross multiply
    13,218.69x = 18,226.50 × 8,972.49
  4. Step 4: Simplify right side
    13,218.69x = 163,537,088.99
  5. Step 5: Solve for x
    x = 163,537,088.99/13,218.69
  6. Step 6: Final answer
    x = 12,371.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.