Home / 13,887.81-19,164.71-7,921.41

Finding the Fourth Proportional to 13,887.81, 19,164.71 and 7,921.41

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Solution

The fourth proportional to 13,887.81, 19,164.71 and 7,921.41 is: 10,931.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,887.81 : 19,164.71 = 7,921.41 : x
  2. Step 2: Convert to fraction form
    13,887.81/19,164.71 = 7,921.41/x
  3. Step 3: Cross multiply
    13,887.81x = 19,164.71 × 7,921.41
  4. Step 4: Simplify right side
    13,887.81x = 151,811,485.83
  5. Step 5: Solve for x
    x = 151,811,485.83/13,887.81
  6. Step 6: Final answer
    x = 10,931.28

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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.