Home / 15,586.48-21,511.17-8,780.55

Finding the Fourth Proportional to 15,586.48, 21,511.17 and 8,780.55

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Solution

The fourth proportional to 15,586.48, 21,511.17 and 8,780.55 is: 12,118.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,586.48 : 21,511.17 = 8,780.55 : x
  2. Step 2: Convert to fraction form
    15,586.48/21,511.17 = 8,780.55/x
  3. Step 3: Cross multiply
    15,586.48x = 21,511.17 × 8,780.55
  4. Step 4: Simplify right side
    15,586.48x = 188,879,944.08
  5. Step 5: Solve for x
    x = 188,879,944.08/15,586.48
  6. Step 6: Final answer
    x = 12,118.19

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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.