Home / 15,785.08-21,787.89-9,330.69

Finding the Fourth Proportional to 15,785.08, 21,787.89 and 9,330.69

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Solution

The fourth proportional to 15,785.08, 21,787.89 and 9,330.69 is: 12,879.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,785.08 : 21,787.89 = 9,330.69 : x
  2. Step 2: Convert to fraction form
    15,785.08/21,787.89 = 9,330.69/x
  3. Step 3: Cross multiply
    15,785.08x = 21,787.89 × 9,330.69
  4. Step 4: Simplify right side
    15,785.08x = 203,296,094.06
  5. Step 5: Solve for x
    x = 203,296,094.06/15,785.08
  6. Step 6: Final answer
    x = 12,879.01

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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.