Home / 19,931.28-27,505.34-10,979.09

Finding the Fourth Proportional to 19,931.28, 27,505.34 and 10,979.09

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Solution

The fourth proportional to 19,931.28, 27,505.34 and 10,979.09 is: 15,151.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,931.28 : 27,505.34 = 10,979.09 : x
  2. Step 2: Convert to fraction form
    19,931.28/27,505.34 = 10,979.09/x
  3. Step 3: Cross multiply
    19,931.28x = 27,505.34 × 10,979.09
  4. Step 4: Simplify right side
    19,931.28x = 301,983,603.34
  5. Step 5: Solve for x
    x = 301,983,603.34/19,931.28
  6. Step 6: Final answer
    x = 15,151.24

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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.