Home / 15,785.18-21,782.70-9,816.68

Finding the Fourth Proportional to 15,785.18, 21,782.70 and 9,816.68

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Solution

The fourth proportional to 15,785.18, 21,782.70 and 9,816.68 is: 13,546.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,785.18 : 21,782.70 = 9,816.68 : x
  2. Step 2: Convert to fraction form
    15,785.18/21,782.70 = 9,816.68/x
  3. Step 3: Cross multiply
    15,785.18x = 21,782.70 × 9,816.68
  4. Step 4: Simplify right side
    15,785.18x = 213,833,795.44
  5. Step 5: Solve for x
    x = 213,833,795.44/15,785.18
  6. Step 6: Final answer
    x = 13,546.49

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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.