Home / 15,378.30-21,224.07-8,665.22

Finding the Fourth Proportional to 15,378.30, 21,224.07 and 8,665.22

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Solution

The fourth proportional to 15,378.30, 21,224.07 and 8,665.22 is: 11,959.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,378.30 : 21,224.07 = 8,665.22 : x
  2. Step 2: Convert to fraction form
    15,378.30/21,224.07 = 8,665.22/x
  3. Step 3: Cross multiply
    15,378.30x = 21,224.07 × 8,665.22
  4. Step 4: Simplify right side
    15,378.30x = 183,911,288.91
  5. Step 5: Solve for x
    x = 183,911,288.91/15,378.30
  6. Step 6: Final answer
    x = 11,959.14

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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.