Home / 13,302.63-18,342.45-9,939.78

Finding the Fourth Proportional to 13,302.63, 18,342.45 and 9,939.78

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Solution

The fourth proportional to 13,302.63, 18,342.45 and 9,939.78 is: 13,705.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,302.63 : 18,342.45 = 9,939.78 : x
  2. Step 2: Convert to fraction form
    13,302.63/18,342.45 = 9,939.78/x
  3. Step 3: Cross multiply
    13,302.63x = 18,342.45 × 9,939.78
  4. Step 4: Simplify right side
    13,302.63x = 182,319,917.66
  5. Step 5: Solve for x
    x = 182,319,917.66/13,302.63
  6. Step 6: Final answer
    x = 13,705.55

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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.