Home / 21,931.08-30,266.64-13,976.88

Finding the Fourth Proportional to 21,931.08, 30,266.64 and 13,976.88

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Solution

The fourth proportional to 21,931.08, 30,266.64 and 13,976.88 is: 19,289.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,931.08 : 30,266.64 = 13,976.88 : x
  2. Step 2: Convert to fraction form
    21,931.08/30,266.64 = 13,976.88/x
  3. Step 3: Cross multiply
    21,931.08x = 30,266.64 × 13,976.88
  4. Step 4: Simplify right side
    21,931.08x = 423,033,195.28
  5. Step 5: Solve for x
    x = 423,033,195.28/21,931.08
  6. Step 6: Final answer
    x = 19,289.21

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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.