Home / 15,780.95-21,777.69-8,707.37

Finding the Fourth Proportional to 15,780.95, 21,777.69 and 8,707.37

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Solution

The fourth proportional to 15,780.95, 21,777.69 and 8,707.37 is: 12,016.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,780.95 : 21,777.69 = 8,707.37 : x
  2. Step 2: Convert to fraction form
    15,780.95/21,777.69 = 8,707.37/x
  3. Step 3: Cross multiply
    15,780.95x = 21,777.69 × 8,707.37
  4. Step 4: Simplify right side
    15,780.95x = 189,626,404.58
  5. Step 5: Solve for x
    x = 189,626,404.58/15,780.95
  6. Step 6: Final answer
    x = 12,016.16

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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.