Home / 15,418.90-21,278.10-8,345.26

Finding the Fourth Proportional to 15,418.90, 21,278.10 and 8,345.26

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Solution

The fourth proportional to 15,418.90, 21,278.10 and 8,345.26 is: 11,516.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,418.90 : 21,278.10 = 8,345.26 : x
  2. Step 2: Convert to fraction form
    15,418.90/21,278.10 = 8,345.26/x
  3. Step 3: Cross multiply
    15,418.90x = 21,278.10 × 8,345.26
  4. Step 4: Simplify right side
    15,418.90x = 177,571,276.81
  5. Step 5: Solve for x
    x = 177,571,276.81/15,418.90
  6. Step 6: Final answer
    x = 11,516.47

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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.