Home / 10,785.40-16,145.70-9,489.40

Finding the Fourth Proportional to 10,785.40, 16,145.70 and 9,489.40

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Solution

The fourth proportional to 10,785.40, 16,145.70 and 9,489.40 is: 14,205.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,785.40 : 16,145.70 = 9,489.40 : x
  2. Step 2: Convert to fraction form
    10,785.40/16,145.70 = 9,489.40/x
  3. Step 3: Cross multiply
    10,785.40x = 16,145.70 × 9,489.40
  4. Step 4: Simplify right side
    10,785.40x = 153,213,005.58
  5. Step 5: Solve for x
    x = 153,213,005.58/10,785.40
  6. Step 6: Final answer
    x = 14,205.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.