Home / 13,721.55-18,935.58-8,055.30

Finding the Fourth Proportional to 13,721.55, 18,935.58 and 8,055.30

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Solution

The fourth proportional to 13,721.55, 18,935.58 and 8,055.30 is: 11,116.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.55 : 18,935.58 = 8,055.30 : x
  2. Step 2: Convert to fraction form
    13,721.55/18,935.58 = 8,055.30/x
  3. Step 3: Cross multiply
    13,721.55x = 18,935.58 × 8,055.30
  4. Step 4: Simplify right side
    13,721.55x = 152,531,777.57
  5. Step 5: Solve for x
    x = 152,531,777.57/13,721.55
  6. Step 6: Final answer
    x = 11,116.22

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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.