Home / 15,418.95-21,278.13-8,345.35

Finding the Fourth Proportional to 15,418.95, 21,278.13 and 8,345.35

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Solution

The fourth proportional to 15,418.95, 21,278.13 and 8,345.35 is: 11,516.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,418.95 : 21,278.13 = 8,345.35 : x
  2. Step 2: Convert to fraction form
    15,418.95/21,278.13 = 8,345.35/x
  3. Step 3: Cross multiply
    15,418.95x = 21,278.13 × 8,345.35
  4. Step 4: Simplify right side
    15,418.95x = 177,573,437.50
  5. Step 5: Solve for x
    x = 177,573,437.50/15,418.95
  6. Step 6: Final answer
    x = 11,516.57

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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.