Home / 13,329.29-18,394.63-8,621.78

Finding the Fourth Proportional to 13,329.29, 18,394.63 and 8,621.78

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Solution

The fourth proportional to 13,329.29, 18,394.63 and 8,621.78 is: 11,898.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,329.29 : 18,394.63 = 8,621.78 : x
  2. Step 2: Convert to fraction form
    13,329.29/18,394.63 = 8,621.78/x
  3. Step 3: Cross multiply
    13,329.29x = 18,394.63 × 8,621.78
  4. Step 4: Simplify right side
    13,329.29x = 158,594,339.51
  5. Step 5: Solve for x
    x = 158,594,339.51/13,329.29
  6. Step 6: Final answer
    x = 11,898.18

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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.