Home / 13,979.71-19,291.85-7,931.06

Finding the Fourth Proportional to 13,979.71, 19,291.85 and 7,931.06

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Solution

The fourth proportional to 13,979.71, 19,291.85 and 7,931.06 is: 10,944.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.71 : 19,291.85 = 7,931.06 : x
  2. Step 2: Convert to fraction form
    13,979.71/19,291.85 = 7,931.06/x
  3. Step 3: Cross multiply
    13,979.71x = 19,291.85 × 7,931.06
  4. Step 4: Simplify right side
    13,979.71x = 153,004,938.96
  5. Step 5: Solve for x
    x = 153,004,938.96/13,979.71
  6. Step 6: Final answer
    x = 10,944.79

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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.