Home / 13,867.89-19,139.67-7,900.11

Finding the Fourth Proportional to 13,867.89, 19,139.67 and 7,900.11

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Solution

The fourth proportional to 13,867.89, 19,139.67 and 7,900.11 is: 10,903.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,867.89 : 19,139.67 = 7,900.11 : x
  2. Step 2: Convert to fraction form
    13,867.89/19,139.67 = 7,900.11/x
  3. Step 3: Cross multiply
    13,867.89x = 19,139.67 × 7,900.11
  4. Step 4: Simplify right side
    13,867.89x = 151,205,498.36
  5. Step 5: Solve for x
    x = 151,205,498.36/13,867.89
  6. Step 6: Final answer
    x = 10,903.28

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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.