Home / 15,919.74-21,979.08-10,256.49

Finding the Fourth Proportional to 15,919.74, 21,979.08 and 10,256.49

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Solution

The fourth proportional to 15,919.74, 21,979.08 and 10,256.49 is: 14,160.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,919.74 : 21,979.08 = 10,256.49 : x
  2. Step 2: Convert to fraction form
    15,919.74/21,979.08 = 10,256.49/x
  3. Step 3: Cross multiply
    15,919.74x = 21,979.08 × 10,256.49
  4. Step 4: Simplify right side
    15,919.74x = 225,428,214.23
  5. Step 5: Solve for x
    x = 225,428,214.23/15,919.74
  6. Step 6: Final answer
    x = 14,160.29

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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.