Home / 13,869.81-19,140.30-7,901.49

Finding the Fourth Proportional to 13,869.81, 19,140.30 and 7,901.49

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Solution

The fourth proportional to 13,869.81, 19,140.30 and 7,901.49 is: 10,904.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,869.81 : 19,140.30 = 7,901.49 : x
  2. Step 2: Convert to fraction form
    13,869.81/19,140.30 = 7,901.49/x
  3. Step 3: Cross multiply
    13,869.81x = 19,140.30 × 7,901.49
  4. Step 4: Simplify right side
    13,869.81x = 151,236,889.05
  5. Step 5: Solve for x
    x = 151,236,889.05/13,869.81
  6. Step 6: Final answer
    x = 10,904.03

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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.