Home / 13,720.19-18,932.54-10,137.35

Finding the Fourth Proportional to 13,720.19, 18,932.54 and 10,137.35

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Solution

The fourth proportional to 13,720.19, 18,932.54 and 10,137.35 is: 13,988.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.19 : 18,932.54 = 10,137.35 : x
  2. Step 2: Convert to fraction form
    13,720.19/18,932.54 = 10,137.35/x
  3. Step 3: Cross multiply
    13,720.19x = 18,932.54 × 10,137.35
  4. Step 4: Simplify right side
    13,720.19x = 191,925,781.01
  5. Step 5: Solve for x
    x = 191,925,781.01/13,720.19
  6. Step 6: Final answer
    x = 13,988.57

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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.