Home / 15,228.88-21,016-8,941.36

Finding the Fourth Proportional to 15,228.88, 21,016 and 8,941.36

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Solution

The fourth proportional to 15,228.88, 21,016 and 8,941.36 is: 12,339.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,228.88 : 21,016 = 8,941.36 : x
  2. Step 2: Convert to fraction form
    15,228.88/21,016 = 8,941.36/x
  3. Step 3: Cross multiply
    15,228.88x = 21,016 × 8,941.36
  4. Step 4: Simplify right side
    15,228.88x = 187,911,621.76
  5. Step 5: Solve for x
    x = 187,911,621.76/15,228.88
  6. Step 6: Final answer
    x = 12,339.16

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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.