Home / 13,386.04-18,460.38-8,665

Finding the Fourth Proportional to 13,386.04, 18,460.38 and 8,665

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Solution

The fourth proportional to 13,386.04, 18,460.38 and 8,665 is: 11,949.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,386.04 : 18,460.38 = 8,665 : x
  2. Step 2: Convert to fraction form
    13,386.04/18,460.38 = 8,665/x
  3. Step 3: Cross multiply
    13,386.04x = 18,460.38 × 8,665
  4. Step 4: Simplify right side
    13,386.04x = 159,959,192.70
  5. Step 5: Solve for x
    x = 159,959,192.70/13,386.04
  6. Step 6: Final answer
    x = 11,949.70

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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.