Home / 15,785.18-21,783.62-8,711.58

Finding the Fourth Proportional to 15,785.18, 21,783.62 and 8,711.58

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Solution

The fourth proportional to 15,785.18, 21,783.62 and 8,711.58 is: 12,022.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,785.18 : 21,783.62 = 8,711.58 : x
  2. Step 2: Convert to fraction form
    15,785.18/21,783.62 = 8,711.58/x
  3. Step 3: Cross multiply
    15,785.18x = 21,783.62 × 8,711.58
  4. Step 4: Simplify right side
    15,785.18x = 189,769,748.32
  5. Step 5: Solve for x
    x = 189,769,748.32/15,785.18
  6. Step 6: Final answer
    x = 12,022.02

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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.