Home / 13,678.02-18,878.81-11,436.03

Finding the Fourth Proportional to 13,678.02, 18,878.81 and 11,436.03

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Solution

The fourth proportional to 13,678.02, 18,878.81 and 11,436.03 is: 15,784.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,678.02 : 18,878.81 = 11,436.03 : x
  2. Step 2: Convert to fraction form
    13,678.02/18,878.81 = 11,436.03/x
  3. Step 3: Cross multiply
    13,678.02x = 18,878.81 × 11,436.03
  4. Step 4: Simplify right side
    13,678.02x = 215,898,580.34
  5. Step 5: Solve for x
    x = 215,898,580.34/13,678.02
  6. Step 6: Final answer
    x = 15,784.34

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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.