Home / 21,979.15-32,972.77-7,188.89

Finding the Fourth Proportional to 21,979.15, 32,972.77 and 7,188.89

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Solution

The fourth proportional to 21,979.15, 32,972.77 and 7,188.89 is: 10,784.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,979.15 : 32,972.77 = 7,188.89 : x
  2. Step 2: Convert to fraction form
    21,979.15/32,972.77 = 7,188.89/x
  3. Step 3: Cross multiply
    21,979.15x = 32,972.77 × 7,188.89
  4. Step 4: Simplify right side
    21,979.15x = 237,037,460.65
  5. Step 5: Solve for x
    x = 237,037,460.65/21,979.15
  6. Step 6: Final answer
    x = 10,784.65

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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.