Home / 15,378.63-21,224.52-8,665.58

Finding the Fourth Proportional to 15,378.63, 21,224.52 and 8,665.58

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Solution

The fourth proportional to 15,378.63, 21,224.52 and 8,665.58 is: 11,959.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,378.63 : 21,224.52 = 8,665.58 : x
  2. Step 2: Convert to fraction form
    15,378.63/21,224.52 = 8,665.58/x
  3. Step 3: Cross multiply
    15,378.63x = 21,224.52 × 8,665.58
  4. Step 4: Simplify right side
    15,378.63x = 183,922,669.90
  5. Step 5: Solve for x
    x = 183,922,669.90/15,378.63
  6. Step 6: Final answer
    x = 11,959.63

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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.