Home / 13,869.09-19,139.49-7,900.74

Finding the Fourth Proportional to 13,869.09, 19,139.49 and 7,900.74

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Solution

The fourth proportional to 13,869.09, 19,139.49 and 7,900.74 is: 10,903.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,869.09 : 19,139.49 = 7,900.74 : x
  2. Step 2: Convert to fraction form
    13,869.09/19,139.49 = 7,900.74/x
  3. Step 3: Cross multiply
    13,869.09x = 19,139.49 × 7,900.74
  4. Step 4: Simplify right side
    13,869.09x = 151,216,134.22
  5. Step 5: Solve for x
    x = 151,216,134.22/13,869.09
  6. Step 6: Final answer
    x = 10,903.10

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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.