Home / 15,780.28-21,777.45-8,707.16

Finding the Fourth Proportional to 15,780.28, 21,777.45 and 8,707.16

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Solution

The fourth proportional to 15,780.28, 21,777.45 and 8,707.16 is: 12,016.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,780.28 : 21,777.45 = 8,707.16 : x
  2. Step 2: Convert to fraction form
    15,780.28/21,777.45 = 8,707.16/x
  3. Step 3: Cross multiply
    15,780.28x = 21,777.45 × 8,707.16
  4. Step 4: Simplify right side
    15,780.28x = 189,619,698.01
  5. Step 5: Solve for x
    x = 189,619,698.01/15,780.28
  6. Step 6: Final answer
    x = 12,016.24

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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.