Home / 13,143.55-18,133.44-8,430.43

Finding the Fourth Proportional to 13,143.55, 18,133.44 and 8,430.43

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Solution

The fourth proportional to 13,143.55, 18,133.44 and 8,430.43 is: 11,631.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,143.55 : 18,133.44 = 8,430.43 : x
  2. Step 2: Convert to fraction form
    13,143.55/18,133.44 = 8,430.43/x
  3. Step 3: Cross multiply
    13,143.55x = 18,133.44 × 8,430.43
  4. Step 4: Simplify right side
    13,143.55x = 152,872,696.58
  5. Step 5: Solve for x
    x = 152,872,696.58/13,143.55
  6. Step 6: Final answer
    x = 11,631.01

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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.