Home / 13,090.29-18,064.71-7,121.94

Finding the Fourth Proportional to 13,090.29, 18,064.71 and 7,121.94

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Solution

The fourth proportional to 13,090.29, 18,064.71 and 7,121.94 is: 9,828.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,090.29 : 18,064.71 = 7,121.94 : x
  2. Step 2: Convert to fraction form
    13,090.29/18,064.71 = 7,121.94/x
  3. Step 3: Cross multiply
    13,090.29x = 18,064.71 × 7,121.94
  4. Step 4: Simplify right side
    13,090.29x = 128,655,780.74
  5. Step 5: Solve for x
    x = 128,655,780.74/13,090.29
  6. Step 6: Final answer
    x = 9,828.34

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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.